ESG investment strategy has attracted increasing attention from the financial market, and the inconsistency of enterprise ESG rating results of different rating agencies has gradually become the focus of attention of regulators and investors. In this article, the listed companies with ESG ratings in Shanghai and Shenzhen A-shares from 2016 to 2020 were selected as the research samples. Combined with difference-in-differences model and ordinary least squares methods, the rationality of these ESG ratings was evaluated by examining the difference in the impact of three international ESG rating agencies, such as Bloomberg, and three Chinese ESG rating agencies, such as Sino-securities, on the stock price crash risk. The research findings are as follows: First, after incorporating the ESG ratings of FTSE Russell, MSCI, and China Alliance of Social Value Investment, the stock price crash risk of enterprises is significantly reduced. Second, the company's share price crash risk will be lower when the ESG evaluation results of Bloomberg or MSCI is better. Third, compared with social indicators, investors pay more attention to the environmental performance of enterprises in decision making. Enterprises with high environmental scores have lower stock price crash risk. The findings of this article play an enlightening role for China to improve its ESG system, construct an ESG disclosure policy, and improve the market role of ESG rating.