diff --git a/src/views/documentTool/documentSplit/modules/SplitAddForm.vue b/src/views/documentTool/documentSplit/modules/SplitAddForm.vue
index c12426f9..92e4949d 100644
--- a/src/views/documentTool/documentSplit/modules/SplitAddForm.vue
+++ b/src/views/documentTool/documentSplit/modules/SplitAddForm.vue
@@ -723,7 +723,10 @@ export default {
      * @param field
      */
     getPlaceholderSuffix (field) {
-      const fieldUsableRange = (field.usableRange || '').split(',')
+      let fieldUsableRange = []
+      if (field.usableRange) {
+        fieldUsableRange = field.usableRange.split(',')
+      }
       if (fieldUsableRange.length === 1) {
         return `（${ClauseUsableRange.nameOfIndex(fieldUsableRange[0])}）`
       }