The coarse TATB was synthesized after continuous stirring a period of time at 155 ℃ when anhydrous-gaseous ammonia with 0.25 MPa was fed on the surface of toluene solution dissolved trichlorotrinitrobenzene(TCTNB) in a high-pressured rector. The influence factors including temperature,time,ammonia flux,TCTNB concentration and stirring rate ect. on TATB particle size and quality were investigated. The results show the factors affect products comprehensively. The toluene and TCTNB affect not only the purity of products but also the productivity,the particle size as well as the physical and chemical properties of TATB. The more pure toluene and TCTNB,the better quality,productivity and the color of TATB was. However,industrial class toluene could also be used to control the particle size and the content of chloride of TATB. The technical parameters of synthezing coarse TATB in lab at 100 g level were optimized.