PEM water electrolysis hydrogen production electrolytic cell and water electrolysis hydrogen production method

The invention discloses a PEM water electrolysis hydrogen production electrolytic cell and a water electrolysis hydrogen production method. The PEM water electrolysis hydrogen production electrolytic tank comprises electrolytic tank single bodies and a tank body used for integrally installing the multiple electrolytic tank single bodies in a parallel connection mode. According to the PEM water electrolysis hydrogen production electrolytic tank, the electrolytic tank single bodies are integrally installed in the tank body in the parallel connection mode, the circuit, the water path and the gas path which are connected with all the electrolytic tank single bodies are connected in parallel, all the electrolytic tank single bodies do not interfere with one another, and when one electrolytic tank single body breaks down and needs to be maintained or replaced, the overall operation cannot be affected. Moreover, the tank body adopts a modularized assembly structure, the electrolytic tank single bodies are very conve