The dangerous characteristics of chlorination process were introduced.Combined with many years of engineering design experience,the design idea of chlorination process safety control was put forward.The project example of 2,4-dichlorophenol was analyzed from the perspective of engineering application.According to the production process,specific flow and safety risk assessment,the safety control suggestions and measures of the chlorination process were provided.Based on the practical application of the project and the information feedback after the enterprise put into operation,the feasibility of the design idea and the safety and effectiveness of the control measures were verified and the customers'approval was obtained.