Based on the maintenance data of pipe bursts in Fangcun village municipal water supply network from 2005 to 2010,the paper studied the relationships between pipe burst and pipe diameter, pipe tube, pipe age as well as reasons of pipe bursts by use of method of statistics analysis.It applied improved analytic hierarchy process (IAHP) to determine weights of influence factors of pipe bursts in Fangcun village municipal water supply network and verified the feasibility of determining weights of influence factors of pipe bursts by IAHP. The order of factors for pipe bursts in Fangcun village municipal water supply network is pipe material＞pipe diameter＞construction quality of pipe＞pipe age＞destruction of external construction and the corresponding weights of factors are 0.4778, 0.1937, 0.1875, 0.0785 and 0.0625 respectively.