diff --git a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessInstanceServiceImpl.java b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessInstanceServiceImpl.java
index fa9ba9bde..0c606bdc8 100644
--- a/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessInstanceServiceImpl.java
+++ b/workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessInstanceServiceImpl.java
@@ -1922,8 +1922,9 @@ public class BpmnProcessInstanceServiceImpl implements BpmnProcessInstanceServic
         } else {
             tenantId = docs.get(0).getTenantId();
         }
-        List<CustomDocDTO> bizCustomDocs = Optional.ofNullable(
-                        runtimeService.getVariable(processInstanceId, SIGN_BIZ_CUSTOM_DOCS, List.class))
+        HistoricVariableInstance historicVariableInstance = historyService.createHistoricVariableInstanceQuery().processInstanceId(processInstanceId)
+                .variableName(SIGN_BIZ_CUSTOM_DOCS).singleResult();
+        List<CustomDocDTO> bizCustomDocs = Optional.ofNullable((List<CustomDocDTO>) historicVariableInstance.getValue())
                 .orElse(Collections.emptyList());
 
         // 业务自定义文档
@@ -1936,7 +1937,8 @@ public class BpmnProcessInstanceServiceImpl implements BpmnProcessInstanceServic
             t.setFileRelationId(s.getFileKey());
         });
 
-        List<String> basedFileTagOrder = runtimeService.getVariable(processInstanceId, SIGN_BIZ_BASED_FILE_TAG_ORDER, List.class);
+        HistoricVariableInstance signBizOrder = historyService.createHistoricVariableInstanceQuery().processInstanceId(processInstanceId).variableName(SIGN_BIZ_BASED_FILE_TAG_ORDER).singleResult();
+        List<String> basedFileTagOrder = Optional.ofNullable((List<String>) signBizOrder.getValue()).orElse(Collections.emptyList());
         if (!CollectionUtils.isEmpty(basedFileTagOrder)) {
             docs.addAll(customBizDocs);
             // 基于 fileTag 排序
@@ -1948,7 +1950,8 @@ public class BpmnProcessInstanceServiceImpl implements BpmnProcessInstanceServic
             docs = docs.stream().sorted(Comparator.comparingInt(d -> fileTagOrderMap.getOrDefault(d.getTag(), Integer.MAX_VALUE)))
                     .collect(Collectors.toList());
         } else {
-            String customAddType = runtimeService.getVariable(processInstanceId, SIGN_BIZ_CUSTOM_DOC_ADD_ORDER_TYPE, String.class);
+            HistoricVariableInstance bizDocOrderType = historyService.createHistoricVariableInstanceQuery().processInstanceId(processInstanceId).variableName(SIGN_BIZ_CUSTOM_DOC_ADD_ORDER_TYPE).singleResult();
+            String customAddType = String.valueOf(bizDocOrderType.getValue());
             if ("last".equals(customAddType)) {
                 docs.addAll(customBizDocs);
             } else {