diff --git a/api/service/UserCaCert.go b/api/service/UserCaCert.go
index 3011db7..272ae0e 100644
--- a/api/service/UserCaCert.go
+++ b/api/service/UserCaCert.go
@@ -530,6 +530,10 @@ func (r *UserCaCertService) AddUserSignConfig(tx *gorm.DB, req requests.AddUserS
 			return false, errors.New("医生详情数据错误")
 		}
 
+		if userDoctorInfo.SignImage == "" {
+			return false, errors.New("缺少签名图片，无法申请")
+		}
+
 		cardNum = userDoctorInfo.CardNum
 		signImagePath = strings.TrimLeft(userDoctorInfo.SignImage, "/")
 	}
@@ -555,6 +559,10 @@ func (r *UserCaCertService) AddUserSignConfig(tx *gorm.DB, req requests.AddUserS
 			return false, errors.New("药师详情数据错误")
 		}
 
+		if userPharmacistInfo.SignImage == "" {
+			return false, errors.New("缺少签名图片，无法申请")
+		}
+
 		cardNum = userPharmacistInfo.CardNum
 		signImagePath = strings.TrimLeft(userPharmacistInfo.SignImage, "/")
 	}