The invention relates to a hydrogen fuel cell powered ship waste heat comprehensive utilization system. The hydrogen fuel cell powered ship waste heat comprehensive utilization system uses cooling water and reaction water produced by a fuel cell as a heat source to supply a refrigeration module, a fresh water production module and a heating module, the heat source is transmitted to the relevant modules through a working water distributor, the refrigeration module absorbs heat through a generator to vaporize a refrigerant to generate cold quantity, the heating module generates warm air throughheat exchange in a heat exchanger of a water heating fan heater, and the fresh water production module absorbs the heat through a generator to enable seawater to be boiled to produce fresh water. According to the hydrogen fuel cell powered ship waste heat comprehensive utilization system, distilled water produced by the fresh water production device is supplied to a proton exchange membrane hydrogen-oxygen fuel cell to humidify and cool the proton exchange membrane battery to meet the stable operation of the fuel cell, meanwhile, the cold quantity generated by absorption refrigeration can be supplied to a cabin for refrigeration, heat energy generated by the heating module is supplied to the cabin of a ship for heating, and the fresh water produced by the fresh water production device canbe used for ship production and life, so that waste heat of the fuel cell ship can be fully utilized to realize green power of the ship and improve energy efficiency.