Abstract: As an important starting point to strengthen pollution prevention and control and environmental management in industrial parks, the planning environmental impact assessment (EIA) system provides the optimal solution to control pollution from the source, but it also faces the problem of a low implementation rate, which makes it difficult to effectively exert rigid constraints. Through the investigation of the planning EIA results of 586 national industrial parks, the achievements of the industrial park planning EIA system in improving the environmental management system, optimizing the scale and layout of the parks, and promoting the industrial upgrading, pollution prevention and ecological environment protection were systematically summarized. In addition, the practical problems faced in the process of planning EIA were comprehensively sorted out, and the fundamental reasons for the confusion in planning EIA review subjects and the lack of dynamic and effective management were deeply analyzed. According to the current situation and requirements of the planning EIA, countermeasures and suggestions were put forward, such as strengthening the top-level design to clarify the review subject, promoting the implementation of the planning EIA by classification, and using the numerical control platform to strengthen effective supervision, so as to improve the effectiveness of the industrial park planning EIA.