diff --git a/business/jxstore/report/report.go b/business/jxstore/report/report.go
index 732fb5e47..de96a2061 100644
--- a/business/jxstore/report/report.go
+++ b/business/jxstore/report/report.go
@@ -561,6 +561,7 @@ func CalculateCoverArea(coordinate []string, vendorID int) (area float64) {
 	// sum += (xyList[0][0] - xyList[len(xyList)-1][0]) * (xyList[0][1] + xyList[len(xyList)-1][1])
 	sum += xyList[len(xyList)-1][0]*xyList[0][1] - xyList[0][0]*xyList[len(xyList)-1][1]
 	sum /= float64(2)
+	sum = math.Abs(sum)
 	area, _ = decimal.NewFromFloat(sum).Round(3).Float64()
 	return area
 }