Aiming at the deficiencies of leakage fault location of underground coal mine at present，a new method of the leakage fault location based on wireless sensor network location algorithm has been proposed in this paper.The principle of wireless sensor location has been discussed and a comparison with the conventional fault location method has been carried out. The DV Hop algorithm has been analyzed and improved in this work.The error rate of the improved DV Hop algorithm is obviously lower than that of the non improved algorithm,and the accuracy of the data transmission rate is higher.The node location errors have been verified through the simulation software.The results have shown that the proposed method can improve the location accuracy and reliability.