Received signal strength indication（RSSI） is widely used to measure the distance in the location of wireless sensor networks.There are random error and outliers in the RSSI signal.Usual algorithms cannot be used to delete the influence of the mixed errors.A weighted location method based on statistics median is proposed on the basis of analysis of error.The proposed method can delete outliers and filter random error

improve the precision of the location and coverage rate of nodes.The simulation experiments show that the proposed method works well.