Identification of key risk factors in port service supply chain based on factor analysis method

On the basis of analyzing the connotation and structure of port service supply chain, this paper identify the exogenous and endogenous risks which include 30 events risk factors of 12 categories in the port service supply chain, analyzes the formation reason of risk by using the method of factor analysis, extracts four categories of key risk from the port service supply chain risk system, which are strategic risk, supply risk, cooperation risk and demand risk. It can provide decision-making basis for port logistics service supplier selection and optimization.