This paper uses discretionary accruals as a proxy for earnings management to examine the impact of financing sources on the earnings management in Chinese listed firms before and after the institutional reforms. The financing sources are divided into debt and equity financing whose research periods are categorized according to the banking reform in 2004 and the securities regulation reform in 2001, respectively. Panel least squares regression is used to analyze the data. The empirical results show that, after the banking reform and the securities regulation reform, managers tend to manipulate earnings more prominently than they did before.