Abstract:By taking 43 accounting firms with security and future qualification from 2010 to 2012 as study samples and using panel data regression research method, an empirical model is established to research the relationship between the CPA industrys main regulatory regime change after 2009 and auditor reputation. The research shows that the regulatory regimes in regulating accounting firms, CPA individuals and internal control auditing fields can improve the auditor reputation to some extent.