Taking China's 2012-2017 A-share listed companies as a research sample, this paper explores the impact of the company's strategic changes on management earnings forecast errors and earnings forecast message types, as well as the role of internal control quality in regulating these relationships. The study results indicate that the greater the company's strategic changes, the greater the error of the management earnings forecasts, the more managers tend to release the bad news of management earnings forecasts. Also, the higher the quality of internal control, the weaker the positive impact of the company's strategic changes on the earnings forecast errors, and the stronger the negative impact on the earnings forecasts message types. When we further consider the company’s strategic resources allocation range and the direction of resources input, all the above conclusions are still established. The research conclusions provide a reference for listed companies to rationally adjust their strategic resources, strengthen internal control construction and effectively understand the connotation of management earnings forecasts information by capital market participants.