Based on the weighted topology entropy and the whole structure of complex network, this paper puts forward the node importance degree evaluation method according to the heterogeneity change rate of network structure. There are four parts in this paper: defining the concept of the weighted topology entropy of complex network, putting forward the concept that the node importance degree depends on the heterogeneity change rate of network structure judging by the reverse evolution principle, putting forward the computing method of the heterogeneity change rate of network cut-vertex, and elaborating the evaluating process of the node importance degree and analyzing particular nodes.