This research examines the relationship between corporate governance mechanisms and firm performance for Chinese listed companies. We focus on four corporate governance mechanisms: Debt Ratio, State Ownership, Managerial Ownership、Domestic/Foreign Institution Ownership. The five proxies to measure the firm performance including ROE, ROA, EPS, Total Asset Turnover ratio and Tobin’s Q. The empirical results show that there is a significant none-linear-relationship between debt ratio and firm performance as well as between insider and firm performance. In addition, the relationship between state ownership and firm performance is positive, and that between domestic institutions and firm performance is significant. Finally, there is no significant relationship between foreign institutions ownership and firm performance.