To obtain the influence rule of different crystallization conditions on the quality and morphology of 1, 1-diamino-2, 2-dinitroethylene(FOX-7)crystals and realize the control of its crystal morphology, the solubility of FOX-7 in dimethyl sulfox- ide(DMSO), water(H₂O)and its binary mixed solvent in the range of 20-95 ℃ and the metastable zone width of binary sol- vent mixtures DMSO / H₂O=2:1(in volume ratio) were measured by turbidimetric method using a CrystalSCAN multi-channel crystallizer. The crystal morphology of FOX-7 under various crystallization conditions was investigated by cooling method, and the mechanical sensitivity and thermal performance of FOX-7 were tested. Results show that the solubility of FOX-7 increases with the increase of temperature and DMSO content in binary mixed solvent. The width of metastable zone becomes narrower with the increase of temperature, decrease of cooling rate and increase of stirring rate. In the process of cooling crystallization, the crystal morphology of FOX-7 is significantly affected by solvent ratio, starting temperature and cooling rate of crystallization. In the range of 50-80 ℃, at the cooling rate of higher than 2 ℃ ·min^-1, the cube-like high-quality FOX-7 crystal with almost the same aspect ratio and regular morphology can be obtained, and particle size is controllable in the range of 20-150 μm. At the same time, the better crystal quality of FOX-7, the higher crystal density and the higher thermal decomposition temperature. The impact sensitivity of FOX-7 is lower and small affected by the crystal morphology, but the friction sensitivity is greatly affected by parti- cle morphology, the frictional sensitivity value of columnar-like crystals is the smallest and that of plate-like crystals is the largest.