To solve the problem of engineering in infrastructure failure caused by irrational topological destruction, the concepts of social network analysis(SNA) method are introduced into topology infrastructure network evaluation, including density, cohesive subgroups, K-core, Lambda-set,tangent pointand center of computing concepts, and a network evaluation system is put forward, which is constituted by the indexes of completeness, levels of border league degree, local stability composition ratio, node vulnerability,operation load balance index and so on. Empirical research on Changshou suggests that stability of network topology and network operation can be evaluated, overload points can be found effectively, and compact extent and completeness degree of topology can be evaluated byusing SNA model.