To ensure the reliability of the wireless mesh network resource Tops assignment,an interference model to node traffic model of WMN was introduced,and channel assignment strategy based on fixed traffic-awareness C-HYA channel assignment strategy was improved,which a greedier algorithm to avoid ripple effect and reduce network Car Sunshade interference was adopted.In addition,the network topology and simulates the algorithm was built.The results of theoretical analysis and simulation show the performance of improved channel assignment strategy compared with traditional algorithm in terms of resisting ripple effect and channel interference.