Abstract: Based on the massive data authorized by CAIDA (cooperative association for Internet data analysis) Skitter project, of which the time span of collection data was from January 2002 to June 2006, the continuing tendencies of genetic and extinct modes in AS-level network and their degree distribution are discussed after analyzing and collating the data. According to the dynamic analysis of the continuing tendency and degree distribution, the PFP model is taken as a prototype where the degree distribution is chosen as the power law distribution, thus giving an AS-level-oriented Internet topology model. Experimental result revealed that the model can embody better the growth process of the AS-level Internet topology if the degree distribution of nodes is ensured to present the power law.