2, 4, 6-Trinitro-3, 5-diamino-N-(1, 2, 4-triazole-4)-aniline was synthesized using 2, 4, 6-trinitrochlorobenzene as the start material which firstly reacted with methylamine alcohol solution, then reacted with sulfuric acid and nitric acid, and finally reacted with 4-amino-1, 2, 4-triazole(ATA) and methanol sodium. The total yield is 80.18%. The target compound and its intermediates were identified by IR, MS and ¹H NMR. The main affecting factors of the reactions were discussed based on reaction mechanism. The results of the DSC test show that the two thermal decomposition peak temperature are respectively 210 ℃ and 328 ℃. The results of the TG test show that there is not any obvious quality loss process below 200 ℃, and the residual decomposition is 38.89% when the temperature is up to 500 ℃, indicating the final compoud has good thermal stability.