Abstract: This article uses a-share listed companies from 2007 to 2014 as the research object, and empirically tests the relationship among CEO power, auditor choice, audit fee. Study found: (1) the greater the CEO power, the less tendency to choose the "big four", and more likely to choose domestic big offices ; (2) the greater the CEO power, the more likely they pay lower audit expense; (3) in the control of self-selection, the CEO power of listed company effects on audit expense is not obvious in the “big four” audit, and the CEO power of listed companies is significantly negative in the comprehensive ranking top ten 10 audit and the domestic top 10 audit. It suggests that the audit bargaining power of domestic large offices is not strong, the strategy of "bigger and stronger" has a long way to go.