The invention discloses energetic ion salts of 1-nitramine-2, 4-dimetridazloe and a preparation method thereof, and belongs to the technical field of energetic materials. The synthetic method is as follows: dissolving the 1-nitramine-2, 4-dimetridazloe in deionized water to obtain a pale yellow clear liquid, adding with stirring 0.5 time molar equivalent of potassium carbonate at room temperature for in-situ generation of 1-nitramine-2, 4-dimetridazloe potassium salt, then adding one time molar equivalent of ammonium chloride, hydrazine hydrochloride, guanidine hydrochloride, monoaminoguanidine hydrochloride, diaminoguanidine hydrochloride, triaminoguanidine hydrochloride and 3, 4, 5-triamino-1, 2, 4-triazole hydrochloride, stirring to precipitate a pale yellow solid precipitate, after about 1 hour of reaction, filtering the pale yellow precipitate, further recrystallizing a coarse product by use of an acetone and diethyl ether mixed solvent to obtain a pure product. The synthetic method of the invention is simple, mild in condition and high in yield, and is environmental friendly due to using of the deionized water as a solvent. The density of involved seven salts is 1.70-1.93g cm<-3>, the detonation velocity calculated by EXPLO software is between 8370 and 9209 m s<-1>, the detonation pressure is between 29.3 and 40.5 GPa, the actually measured impact sensitivity is 4-40J, the detonation performance is excellent, and the energetic ion salts are potential energetic materials.