The invention discloses an integrated risk assessment method for a pipe network. The method comprises the following steps that: S1: establishing a pipeline risk probability model algorithm; S2: in a pipe network risk probability model algorithm, calculating a pipe network leakage occurrence probability by a pipe network attribute information amount and historical leakage data; S3: then, overlapping P1, P2, P3 and P4 according to a ratio to obtain a pipe network risk probability result; and S4: associating the result to pipe network topological structure information to carry out the risk level assessment of the pipe network. By use of the method, a pipe network leakage failure analysis model is established, and the attribute information of the pipe network, the historical maintenance information, user information to which the pipe network relates, peripheral geological information and peripheral environment information are combined to carry out comprehensive assessment on the operation risk of the pipe network. The method has the advantages of accurate assessment result and wide application range.