Cocrystal is composed of different neutral components through intermolecular non-bond interactions at molecular level and it has fixed ratio and particular structure. Cocrystallization technology is a novel method for ameliorating properties of energetic materials and it has wide development prospect and application value. It can decrease the sensitivity， improve the mechanical properties， thermal performance， and energy density of energetic materials. The research progress of preparation and application of energetic cocrystals was summarized， including the current research status， preparation method， characterization methods， and formation mechanism. The existing problems of energetic cocrystals were introduced： first， the properties of some cocrystal explosives need to be further improved； second， the preparation of cocrystal requires harsh conditions with low product yield； third， the characterization and test methods lack variety. The further development direction of cocrystal explosives were pointed out： strengthen the research of multiple components energetic cocrystals， improve the technologies to increase the yield， investigate the crystallization dynamics behavior to seek for the best cocrystallization conditions， and look for effective means to characterize the cocrystal structure.