P-trifluoromethylaniline is an important chemical raw material, especially in pesticide and medicine. 2,6-dichloro-aminotrifluoromethyltoluene can be obtained by chlorination of p-trifluoromethylamine. It is an important intermediate. It is used in the pesticide industry to synthesize high-efficiency and low toxicity insecticides, such as ruignan, fenvalerate, flufenuron, acetochlor and acetofenofluolin, etc., and used in the pharmaceutical industry to synthesize leflunomide, a new immunosuppressant. With the development of green chemical technology and new drugs, new applications have been developed continuously, and have become an important chemical product with a promising future.