diff --git a/src/components/FileEcho.vue b/src/components/FileEcho.vue
index 52e8e2f6..e2b7d061 100644
--- a/src/components/FileEcho.vue
+++ b/src/components/FileEcho.vue
@@ -115,7 +115,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         window.open(url)
         return
diff --git a/src/components/ProcessDetailList.vue b/src/components/ProcessDetailList.vue
index b2aaeae5..4e572645 100644
--- a/src/components/ProcessDetailList.vue
+++ b/src/components/ProcessDetailList.vue
@@ -339,7 +339,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         window.open(url)
         return
diff --git a/src/utils/util.js b/src/utils/util.js
index aea05742..24d04609 100644
--- a/src/utils/util.js
+++ b/src/utils/util.js
@@ -704,7 +704,7 @@ export function previewFileCurrentWindowByFileId (fileId) {
         const FILE_TYPE_IMGS = ['jpg', 'jpeg', 'png', 'raw']
         const FILE_TYPE_PDF = 'pdf'
         // pdf预览
-        if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+        if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
           const url = previewPdf(file.id)
           window.open(url, '_self')
           return
diff --git a/src/views/businessSupport/questionAnswerLibrary/QuestionAnswerList.vue b/src/views/businessSupport/questionAnswerLibrary/QuestionAnswerList.vue
index b7bc3fa4..b69ab570 100644
--- a/src/views/businessSupport/questionAnswerLibrary/QuestionAnswerList.vue
+++ b/src/views/businessSupport/questionAnswerLibrary/QuestionAnswerList.vue
@@ -235,7 +235,7 @@ export default {
         return
       }
       // 图片预览，使用自己添加的组件
-      if (FILE_TYPE_IMGS.includes(fileSuffix)) {
+      if (FILE_TYPE_IMGS.includes(fileSuffix.toLowerCase())) {
         this.imageUrl = getFileAccessHttpUrl(record.declareFile)
         // 获取viewer实例
         const viewer = this.$el.querySelector('.image').$viewer
@@ -245,7 +245,7 @@ export default {
         return
       }
       // pdf预览
-      if (FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(record.declareFile)
         window.open(url)
         return
diff --git a/src/views/businessSupport/questionAnswerLibrary/page/AnswerPage.vue b/src/views/businessSupport/questionAnswerLibrary/page/AnswerPage.vue
index b18e6070..fdd825ff 100644
--- a/src/views/businessSupport/questionAnswerLibrary/page/AnswerPage.vue
+++ b/src/views/businessSupport/questionAnswerLibrary/page/AnswerPage.vue
@@ -217,7 +217,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         console.log(url)
         window.open(url)
diff --git a/src/views/enterpriseStandardLibrary/check/modules/CheckReportModal.vue b/src/views/enterpriseStandardLibrary/check/modules/CheckReportModal.vue
index 99ab1a7a..0190160b 100644
--- a/src/views/enterpriseStandardLibrary/check/modules/CheckReportModal.vue
+++ b/src/views/enterpriseStandardLibrary/check/modules/CheckReportModal.vue
@@ -161,7 +161,7 @@ export default {
         return
       }
       // 图片预览，使用自己添加的组件
-      if (FILE_TYPE_IMGS.includes(fileSuffix)) {
+      if (FILE_TYPE_IMGS.includes(fileSuffix.toLowerCase())) {
         this.imageUrl = getFileAccessHttpUrl(record.declareFile)
         // 获取viewer实例
         const viewer = this.$el.querySelector('.image').$viewer
@@ -171,7 +171,7 @@ export default {
         return
       }
       // pdf预览
-      if (FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(record.declareFile)
         window.open(url)
         return
diff --git a/src/views/enterpriseStandardLibrary/plan/detail/PlanDetail.vue b/src/views/enterpriseStandardLibrary/plan/detail/PlanDetail.vue
index a839ae1e..f5f0aaf3 100644
--- a/src/views/enterpriseStandardLibrary/plan/detail/PlanDetail.vue
+++ b/src/views/enterpriseStandardLibrary/plan/detail/PlanDetail.vue
@@ -235,7 +235,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.response.result.id)
         window.open(url)
         return
diff --git a/src/views/enterpriseStandardLibrary/standard/EnterpriseStandardList.vue b/src/views/enterpriseStandardLibrary/standard/EnterpriseStandardList.vue
index de70e116..d6acba21 100644
--- a/src/views/enterpriseStandardLibrary/standard/EnterpriseStandardList.vue
+++ b/src/views/enterpriseStandardLibrary/standard/EnterpriseStandardList.vue
@@ -753,7 +753,7 @@ export default {
         for (let i = 0; i < idArray.length; i++) {
           const id = idArray[i]
           const name = nameArray[i]
-          var suffix = name.substring(name.lastIndexOf('.') + 1)
+          var suffix = name.substring(name.lastIndexOf('.') + 1).toLowerCase()
           if (suffix === 'pdf') {
             pdfFileList.push({ id, name, suffix })
           }
diff --git a/src/views/enterpriseStandardLibrary/standard/detail/EnterpriseStandardDetail.vue b/src/views/enterpriseStandardLibrary/standard/detail/EnterpriseStandardDetail.vue
index 47a9258f..5fa809f4 100644
--- a/src/views/enterpriseStandardLibrary/standard/detail/EnterpriseStandardDetail.vue
+++ b/src/views/enterpriseStandardLibrary/standard/detail/EnterpriseStandardDetail.vue
@@ -309,7 +309,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         console.log(url)
         window.open(url)
diff --git a/src/views/projectLibrary/specialProjectLibrary/modules/BasisDescriptionModal.vue b/src/views/projectLibrary/specialProjectLibrary/modules/BasisDescriptionModal.vue
index a99c217a..56003f36 100644
--- a/src/views/projectLibrary/specialProjectLibrary/modules/BasisDescriptionModal.vue
+++ b/src/views/projectLibrary/specialProjectLibrary/modules/BasisDescriptionModal.vue
@@ -91,6 +91,11 @@ import { kkFilePreview } from '../../../../utils/kkFilePreview'
 import UploadFile from '../../../../components/UploadFile'
 import STreeSelect from '../../../../components/STreeSelect'
 
+// 支持预览的文件后缀
+const CAN_PREVIEW_FILE_SUFFIX = ['jpg', 'jpeg', 'png', 'pdf', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx']
+const FILE_TYPE_IMGS = ['jpg', 'jpeg', 'png', 'raw']
+const FILE_TYPE_PDF = 'pdf'
+
 export default {
   name: 'BasisDescriptionModal',
   components: { STreeSelect, UploadFile, JTable },
@@ -200,7 +205,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         window.open(url)
         return
diff --git a/src/views/standardRegulationLibrary/commonPage/StandardDetailPage.vue b/src/views/standardRegulationLibrary/commonPage/StandardDetailPage.vue
index 772601fe..b17e1ee6 100644
--- a/src/views/standardRegulationLibrary/commonPage/StandardDetailPage.vue
+++ b/src/views/standardRegulationLibrary/commonPage/StandardDetailPage.vue
@@ -413,7 +413,7 @@ export default {
         return
       }
       // pdf预览
-      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix)) {
+      if (canPreview && FILE_TYPE_PDF.includes(fileSuffix.toLowerCase())) {
         const url = previewPdf(file.id)
         window.open(url)
         return
diff --git a/src/views/standardRegulationLibrary/domesticStandard/DomesticStandardList.vue b/src/views/standardRegulationLibrary/domesticStandard/DomesticStandardList.vue
index baa16d1b..f4c94b20 100644
--- a/src/views/standardRegulationLibrary/domesticStandard/DomesticStandardList.vue
+++ b/src/views/standardRegulationLibrary/domesticStandard/DomesticStandardList.vue
@@ -659,7 +659,7 @@ export default {
         for (let i = 0; i < idArray.length; i++) {
           const id = idArray[i]
           const name = nameArray[i]
-          var suffix = name.substring(name.lastIndexOf('.') + 1)
+          var suffix = name.substring(name.lastIndexOf('.') + 1).toLowerCase()
           if (suffix === 'pdf') {
             pdfFileList.push({ id, name, suffix })
           }
diff --git a/src/views/standardRegulationLibrary/overseasStandard/OverseasStandardList.vue b/src/views/standardRegulationLibrary/overseasStandard/OverseasStandardList.vue
index 9c030132..cbbe5187 100644
--- a/src/views/standardRegulationLibrary/overseasStandard/OverseasStandardList.vue
+++ b/src/views/standardRegulationLibrary/overseasStandard/OverseasStandardList.vue
@@ -660,7 +660,7 @@ export default {
         for (let i = 0; i < idArray.length; i++) {
           const id = idArray[i]
           const name = nameArray[i]
-          var suffix = name.substring(name.lastIndexOf('.') + 1)
+          var suffix = name.substring(name.lastIndexOf('.') + 1).toLowerCase()
           if (suffix === 'pdf') {
             pdfFileList.push({ id, name, suffix })
           }