Abstract: On the basis of asset, threat, vulnerability and risk assessment of basic elements, based on the threat of trapezoidal fuzzy analytic hierarchy process in e-government information security risk assessment method.The method for threat as the core, through the analysis of threats, trapezoidal fuzzy number, analytic hierarchy process, combined with the multiple attribute decision making theory to get the probability of occurrence of the consequences of threat, attribute and attribute value, get of e-government information systems security threat index, finally uses the threat index on the risk sort, get system information security risk rating.The simulation results show that, the method is able to quantify the e-government system information security risk index, to effectively improve the accuracy of risk assessment, is an effective evaluation method of information security in electronic government system.