Spring starter is a kind of starter, which can transform manual cranking energy into disc spring potential energy. It can start the diesel engine with manual cranking energy. It is dealing with the problem which the electric starter is out of electricity. It can make the engine started without a battery or other external systems (such as gasholder, cable, air compressor, manometer, accumulator, etc.). There is no cost for maintenance of it, and it has an explosion-proof structure.