Based on the analysis of the reform in initial public offering(IPO) examination system, this paper, taking those IPO companies in 2008-2012 as samples, has used empirical methods to research on the relationship between political connections, audit fees and auditor market share. The conclusion shows that, after the reform, accounting firms with members in China securities issuance examination committee (CSIEC) have charged PreIPO companies extra audit fees. Their market share has increased as well. On the other hand, political connections can help PreIPO companies to reduce their audit expenditure.