diff --git a/pqs-harmonic/harmonic-boot/src/main/java/com/njcn/harmonic/service/impl/HarmonicServiceImpl.java b/pqs-harmonic/harmonic-boot/src/main/java/com/njcn/harmonic/service/impl/HarmonicServiceImpl.java
index d9681a7fa..1985e7614 100644
--- a/pqs-harmonic/harmonic-boot/src/main/java/com/njcn/harmonic/service/impl/HarmonicServiceImpl.java
+++ b/pqs-harmonic/harmonic-boot/src/main/java/com/njcn/harmonic/service/impl/HarmonicServiceImpl.java
@@ -442,8 +442,8 @@ public class HarmonicServiceImpl implements IHarmonicService {
         areaDTO.setAverageOverDay(avgOverDay);
         areaDTO.setRatio(Math.min(ratio,100.0));
         //月监测点超标占比
-        Double lineRatio = BigDecimal.valueOf(overLineCount*100/onlineCount).setScale(2, RoundingMode.HALF_UP).doubleValue();
-        areaDTO.setLineRatio(lineRatio);
+        Double lineRatio = onlineCount==0?0:BigDecimal.valueOf(overLineCount*100/onlineCount).setScale(2, RoundingMode.HALF_UP).doubleValue();
+        areaDTO.setLineRatio(Math.min(lineRatio,100.0));
         return areaDTO;
     }
 
@@ -522,8 +522,8 @@ public class HarmonicServiceImpl implements IHarmonicService {
         areaDTO.setAverageOverDay(avgOverDay);
         areaDTO.setRatio(Math.min(ratio,100.0));
         //月监测点超标占比
-        Double lineRatio = BigDecimal.valueOf(overLineCount*100/onlineCount).setScale(2, RoundingMode.HALF_UP).doubleValue();
-        areaDTO.setLineRatio(lineRatio);
+        Double lineRatio = onlineCount==0?0:BigDecimal.valueOf(overLineCount*100/onlineCount).setScale(2, RoundingMode.HALF_UP).doubleValue();
+        areaDTO.setLineRatio(Math.min(lineRatio,100.0));
         return areaDTO;
     }