diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomGetFormInstanceModelCmd.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomGetFormInstanceModelCmd.java
index 3fca8df22..9d62770bf 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomGetFormInstanceModelCmd.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/engine/cmd/CustomGetFormInstanceModelCmd.java
@@ -365,7 +365,7 @@ public class CustomGetFormInstanceModelCmd extends GetFormInstanceModelCmd {
                                                 if (rowMap.containsKey(sf.getId())) {
                                                     try {
                                                         String updateValueJson = objectMapper.writeValueAsString(rowMap.get(sf.getId()));
-                                                        if (StringUtils.hasText(updateValueJson)) {
+                                                        if (StringUtils.hasText(updateValueJson) && !Objects.equals("\"\"", updateValueJson)) {
                                                             List<UploadFieldDTO> uploadFiles = formEngineConfiguration.getObjectMapper()
                                                                     .readValue(updateValueJson, new TypeReference<List<UploadFieldDTO>>() {
                                                                     });