For the purpose of improving the security of optical communication network , a method for evaluating the security risk level of optical communication network based on edge computing is proposed. Firstly , the security risk as-sessment index of optical communication network is constructed , and the index data of each terminal is calculated using each edge computing node. Based on the calculation results of various evaluation index data , a fuzzy comprehensive e- valuation model is constructed within the cloud center computing layer. Based on the membership degree in fuzzy mathematics theory , multi-level fuzzy evaluation of optical communication network security risks is achieved. The ex- perimental results show that the highest accuracy of the optical communication network security risk level evaluation u- sing this method is 97% , and the lowest error rate is 3% . This method can effectively implement the evaluation process , and network optimization based on the evaluation results can improve the security performance of the optical communication network.