The main development directions of aminimide compounds synthesized by unsymmertrical dimethyl-hydrazine (UDMH) during the past decade were reviewed. The main chemical properties of aminimides, such as pyrolysis, photolysis and polymerization, were analyzed. The mechanism of pyrolysis was compared with that of photolysis. The applications of aminimides in latent curing agents, surfactants, molecular identification and drugs were summarized. Results show that the preparation and applications of aminimides are an effective approach to reclaim scrap UDMH.