The invention discloses power supply equipment, which aims at providing a minitype elastic steam-driven generator. The minitype elastic steam-driven generator comprises a crank link mechanism, a speed transforming gear and a microgenerator which are all sequentially connected, and also comprises an elastic bellows, a minitype catalytic combustor and a gas circuit switch, wherein the minitype catalytic combustor is arranged in one end of the elastic bellows, and the other end of the elastic bellows is connected with the crank link mechanism; the gas circuit switch is the switch of the fuel gas supply pipeline of the minitype catalytic combustor and is arranged in the limiting position of the stroke of the elastic bellows. The invention has the advantages of longer power supply time, high efficiency, no generation of heavy metal pollution, environmental protection and safety.