High-pure TATB was prepared by repeatedly recrystallizing the commercial product with N, N-dimethyl formanmide. The TATB refined up to 99. 98% was qualitatively aud quantitatively characterized with a series of methods iucluding infra-red spectrum (IR), differential thermal analysis (DTA), visible spectrum, chlorine content, DMSO soluble substances, ash content, high pressure liquid chromatograph (HPLC), polarograph, determination of ammonia and so forth.