diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
index 66b3cee..6dc2ea0 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
@@ -36,6 +36,7 @@ import org.springframework.data.mongodb.core.query.Update;
 import org.springframework.stereotype.Service;
 
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.util.*;
 
 @Service
@@ -279,12 +280,10 @@ public class PatientWeightServiceImpl extends BaseServiceImpl implements Patient
     @Override
     public  String getBmi(String weight, String height) {
         if(StringUtils.isNotBlank(weight) && StringUtils.isNotEmpty(height)) {
-            Double w = Double.parseDouble(weight);
-            Double h = Double.parseDouble(height) / 100l;
-            Double bmi = w / (h * h);
-            BigDecimal bg = new BigDecimal(bmi);
-            bmi = bg.setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
-            return bmi.toString();
+            java.text.DecimalFormat df = new java.text.DecimalFormat("#.#");
+            df.setRoundingMode(RoundingMode.FLOOR);
+            double tzzs = Double.parseDouble(weight) / Math.pow(Double.parseDouble(height) / 100, 2);
+            return df.format(tzzs);
         }
         return "";
     }