The synthesis of boron hydrides were briefly reviewed, and latest study as solid propellant burning rate catalyst were summarized. Ionic borohydride salt and carborane can respectively regulate solid propellant burning rate in large ranges, but the synthesis process of ionic borohydride salt is relatively simple and low cost. With high density, high energy, insensitive and low toxicity, energetic ionic liquids (salt) has good prospects in propellants and explosives.