Hydrogen fuel cell hydrogen-water separation and circulation device convenient for rapid cold start of electric pile

The invention relates to a hydrogen fuel cell hydrogen-water separation and circulation device convenient for rapid cold start of an electric pile, and belongs to the technical field of hydrogen fuel cells. Comprising a hydrogen-water separator, an ejector and a vortex pump, the hydrogen-water separator, the ejector and the vortex pump are integrally formed, and the hydrogen-water separator is further integrated with a cooling circulation system; a shell of the hydrogen-water separator is of a double-layer structure, cooling water of the cooling circulation system is located between the double-layer structure of the hydrogen-water separator, an upper filter screen and a lower filter screen are arranged in the hydrogen-water separator, and a flow deflector is arranged between the two filter screens. The hydrogen circulating system integrates the advantages of the vortex pump and the ejector, the ejector is used for leading ejection backflow at a large-flow working condition point, the vortex pump is used for a