The invention discloses a method for synthesizing 5,5'-dinitroamino-3,3'-co-1,2,4-
triazole carbohydrazide. The
carbohydrazide has the following
structural formula, wherein the
structural formula is as shown in the specification. In the method, 5,5'-diamino-3,3'-co-1,2,4-
triazole serves as a
raw material, and the method comprises the following steps: (1) adding the 5,5'-diamino-3,3'-co-1,2,4-
triazole into a
nitric acid and
ammonium nitrate system in batches at the temperature of 0 DEG C, wherein a
molar ratio of the 5,5'-diamino-3,3'-co-1,2,4-triazole,
nitric acid to
ammonium nitrate is 1:40: (4-8), stirring for 15 minutes, raising the temperature to 25 DEG C, reacting for 1.5 hours, pouring the reaction liquid into
ice water, filtering, washing and
drying to obtain 5,5'-dinitroamino-3,3'-co-1,2,4-triazole; and (2) adding the 5,5'-dinitroamino-3,3'-co-1,2,4-triazole, an aqueous liquid of
sodium hydroxide and
carbohydrazide into a reaction
bottle under the temperature of 60 DEG C, wherein a
molar ratio of the 5,5'-dinitroamino-3,3'-co-1,2,4-triazole,
sodium hydroxide to carbohydrazide is 1:3:2.05, stirring for 20 minutes, dropwise adding 35
mass percent of
hydrochloric acid until the pH value is 4-7, reducing the temperature to 25 DEG C, separating out a white product 5,5'-dinitroamino-3,3'-co-1,2,4-triazole carbohydrazide in the
system. The method is mainly used for preparing the5,5'-dinitroamino-3,3'-co-1,2,4-triazole carbohydrazide.