Abstract: Pipeline integrity management is a kind of pipeline management mode widely applied by international pipeline companies nowadays, while the risk evaluation is an important chain in the process of pipeline integrity management.The basic procedure of pipeline risk evaluation is that every factor possibly dangerous to the safety of pipeline operation and possible consequences resulted from that are first analyzed, predicted and calculated, then ranking of the pipeline risks is made based on the risk degree, which can be taken as a theoretical base for the control of pipeline management. Taking the risk calculating process of Neijing-Chongqing pipeline section in Lanzhou-Chengdu-Chongqing Oil Products Pipeline for example, the paper introduces the application of semiquantitative risk evaluation method to the pipeline and provides evaluation conclusion.