diff --git a/shgx-dryingroom/src/main/java/com/shgx/dryingroom/collect/AutoCollectService.java b/shgx-dryingroom/src/main/java/com/shgx/dryingroom/collect/AutoCollectService.java
index b4b520f..e179561 100644
--- a/shgx-dryingroom/src/main/java/com/shgx/dryingroom/collect/AutoCollectService.java
+++ b/shgx-dryingroom/src/main/java/com/shgx/dryingroom/collect/AutoCollectService.java
@@ -399,8 +399,18 @@ public class AutoCollectService {
         dbData.setEquipmentType("1");
         dbData.setStatus("1");
         dbData.setSetTem(equipmentInfo.getSetTem());
-        paramDTO.minValue = ruleCache.get(equipmentInfo.getRuleCode()).getMinValue();
-        paramDTO.maxValue = ruleCache.get(equipmentInfo.getRuleCode()).getMaxValue();
+        String ruleCode = equipmentInfo.getRuleCode();
+        DryParamThreshold rule = ruleCache.get(ruleCode);
+        if (rule != null) {
+            paramDTO.minValue = rule.getMinValue();
+            paramDTO.maxValue = rule.getMaxValue();
+        } else {
+            // 无规则时设默认值（避免前端显示异常）
+            paramDTO.minValue = "0";
+            paramDTO.maxValue = "0";
+            log.warn("【转换DryingDTO】设备{}的规则{}在缓存中不存在，阈值设为默认值",
+                    equipmentInfo.getEquipmentCode(), ruleCode);
+        }
         dbData.setParamDTO(paramDTO);
 
         return dbData;