Abstract: Accurate fault location of distribution network is of great significance for improving the reliability of power supply and reducing the loss caused by continuous power outage. However, due to the fact that the distribution networks have multiple branch feeders and shorter line lengths, making it more difficult to locate faults compared with transmission network. In this paper, an accurate fault location method of distribution network is developed using the limited number of synchronization phase measurement units (PMUs). The method includes two steps: First, according to the distributed parameter model, after the fault happen, the voltage and current information from the PMUs installed at the end of the line will be uploaded to calculate the voltage at the headend of the branching point. According to theorem that if the fault line exists fault branch, the headend voltage of the fault branch will be abnormal. Then, the fault distance could be calculated according to the voltage distribution rule along the two ends of the fault branch. The effectiveness of the proposed algorithm is verified by electromagnetic transient simulation. The simulation result shows that the proposed algorithm can use limited number of PMUs to locate fault accurately without the need of PMUs on both ends of lines, which is not affected by transition resistance and fault type. While ensuring high accuracy, the proposed method is very economic and has well application prospects.