Aimed at the problem that node importance evaluation of communication network is influenced by multi-factors, an evaluation method of node importance based on betweenness influencing matrix is proposed. In order to achieve an impersonal evaluation result, in the method, based on the influence of the topology structure of network on importance, the node betweenness is taken as a basic parameter to describe the controlling capacity of node to the shortest path. And then the influences of multi-factors such as degree, distance, min-path and other factors are put into the process of calculation to describe the difference in location and connecting branch between the nodes. Then, the difference between the direct and indirect influences by the distance attenuation is given. Finally, in combination with the proposed betweenness calculation based on contribution, the calculation of communication network node importance is done on the basis of the betweenness influencing matrix, thus an objective evaluation on node importance is achieved. The simulation result shows that the method is effective and objective without setting any factor weight.