diff --git a/jero-boot/jero-boot-modules/src/main/java/com/jero/modules/project/service/impl/ProjectLibraryBaseServiceImpl.java b/jero-boot/jero-boot-modules/src/main/java/com/jero/modules/project/service/impl/ProjectLibraryBaseServiceImpl.java
index c445270a2..6a2e0cf55 100644
--- a/jero-boot/jero-boot-modules/src/main/java/com/jero/modules/project/service/impl/ProjectLibraryBaseServiceImpl.java
+++ b/jero-boot/jero-boot-modules/src/main/java/com/jero/modules/project/service/impl/ProjectLibraryBaseServiceImpl.java
@@ -361,9 +361,12 @@ public class ProjectLibraryBaseServiceImpl extends ServiceImpl<ProjectLibraryBas
 							certificationEngineerName = sysUsers.stream().filter(e -> data.equals(e.getId()))
 									.map(sysUser -> sysUser.getUsername()).collect(Collectors.joining(","));
 						}
-						certificationName.append(certificationEngineerName).append(" ");
+						certificationName.append(certificationEngineerName).append(",");
+					}
+					if(StringUtils.isNotBlank(certificationName)){
+						String substring = certificationName.substring(0, certificationName.length() - 1);
+						projectLibraryBase.setCertificationEngineerName(substring);
 					}
-					projectLibraryBase.setCertificationEngineerName(certificationName.toString());
 				}
 			}
 		}