Abstract: Accurate network topology models are critical to the analysis, operation and planning of distribution systems. With the rapid increase of new customers and the frequent feeder upgrades, there are no good records corresponding of customer’s phase and distribution transformer, and the topology information the feeder line. Thus, most electric power companies in China don’t have great records of the topology information of the low-voltage distribution network. With the improvement of the intelligence and automation level of distribution network especially the smart metering implementation the electric power company can acquire a large amount of measurements through the power consumption collection system, this provides an opportunity for topology model establishment in low voltage distribution network. This paper proposes a topology identification method of low-voltage distribution network based on smart meter measurements, by analyzing the customer's voltage profile data, the customers on the same distribution feeder phase can be identified. The problem of lack of connection information between customers of low-voltage distribution network can be partially solved.