diff --git a/src/main/java/com/xydl/cac/service/UnitService.java b/src/main/java/com/xydl/cac/service/UnitService.java
index 5301bb7..87b852f 100644
--- a/src/main/java/com/xydl/cac/service/UnitService.java
+++ b/src/main/java/com/xydl/cac/service/UnitService.java
@@ -13,4 +13,6 @@ public interface UnitService {
     void update(Unit item) throws Exception;
 
     void delete(Integer id);
+
+    String findUnitInCache(String field);
 }
diff --git a/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java b/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
index 20fc4eb..566fe3c 100644
--- a/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
+++ b/src/main/java/com/xydl/cac/service/impl/NSensorServiceImpl.java
@@ -8,9 +8,9 @@ import com.xydl.cac.model.SensorDetail;
 import com.xydl.cac.model.SensorUpdateModel;
 import com.xydl.cac.repository.NPointRepository;
 import com.xydl.cac.repository.NSensorRepository;
-import com.xydl.cac.repository.UnitRepository;
 import com.xydl.cac.service.DataService;
 import com.xydl.cac.service.NSensorService;
+import com.xydl.cac.service.UnitService;
 import com.xydl.cac.service.ZsbService;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
@@ -34,7 +34,7 @@ public class NSensorServiceImpl implements NSensorService {
     @Resource
     NPointRepository pointRepository;
     @Resource
-    UnitRepository unitRepository;
+    UnitService unitService;
     @Resource
     DataService dataService;
     @Resource
@@ -129,10 +129,7 @@ public class NSensorServiceImpl implements NSensorService {
         List<NPoint> pointList = new ArrayList<>();
         for (NPoint point : points) {
             if (StringUtils.isNotBlank(point.getField())) {
-                List<Unit> unitList = unitRepository.findByField(point.getField());
-                if (!CollectionUtils.isEmpty(unitList)) {
-                    point.setUnit(unitList.get(0).getUnit());
-                }
+                point.setUnit(unitService.findUnitInCache(point.getField()));
                 pointList.add(point);
             }
         }
diff --git a/src/main/java/com/xydl/cac/service/impl/UnitServiceImpl.java b/src/main/java/com/xydl/cac/service/impl/UnitServiceImpl.java
index c8d5eeb..3ddb82e 100644
--- a/src/main/java/com/xydl/cac/service/impl/UnitServiceImpl.java
+++ b/src/main/java/com/xydl/cac/service/impl/UnitServiceImpl.java
@@ -10,6 +10,7 @@ import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.CollectionUtils;
 
 import javax.annotation.Resource;
+import java.util.HashMap;
 import java.util.List;
 
 @Service
@@ -20,6 +21,8 @@ public class UnitServiceImpl implements UnitService {
     @Resource
     UnitRepository repository;
 
+    HashMap<String, String> cache = new HashMap<>();
+
     @Override
     public List<Unit> listAll() {
         return repository.findAll();
@@ -32,16 +35,30 @@ public class UnitServiceImpl implements UnitService {
         if (!CollectionUtils.isEmpty(list)) {
             throw new BusinessException("该字段已存在");
         }
+        cache.clear();
         return repository.save(item);
     }
 
     @Override
     public void update(Unit item) throws Exception {
         repository.save(item);
+        cache.clear();
     }
 
     @Override
     public void delete(Integer id) {
         repository.deleteById(id);
+        cache.clear();
+    }
+
+    @Override
+    public String findUnitInCache(String field) {
+        if (cache.size() < 1) {
+            List<Unit> list = repository.findAll();
+            for (Unit item : list) {
+                cache.put(item.getField().toLowerCase(), item.getUnit());
+            }
+        }
+        return cache.get(field.toLowerCase());
     }
 }