NOVELTY - A movable hydrogen generator comprises water-decomposable aluminum, hydrogen part, and hot water supply part. The hydrogen generator includes a barrel, a condensation filter, a hydrogen storage device, a constant-voltage hydrogen supply device, a hydrogen purifier, hydrogen tubes, a residual hot water supply pipe, a residual hot water return pipe, an electrically controlled three-way distribution valve, an electric heater, an electric water feeding valve, a water supply connector, an electric water return valve, and a water return connector.    USE - Movable hydrogen generator for vehicles.    ADVANTAGE - The hydrogen generator has a simple structure and is convenient to implement. The used working substances are non-toxic, harmless, flavorless, and convenient and safe to use; and have lower cost than gasoline.    DETAILED DESCRIPTION - A movable hydrogen generator comprises water-decomposable aluminum, hydrogen part, and hot water supply part. The hydrogen generator includes a barrel, a heating water pipe, an insulating layer, a barrel cover, a hydrogen outlet interface, two thermometers with electric contacts, four one-way valves, five hydrogen tubes, three pressure meters with electric contacts, a condensation filter, three electric valves, a constant-voltage hydrogen supply device, an electric upper limit controller, an electric lower limit controller, a hydrogen purifier, a heat dissipation water tank, a water pump, a hydrogen storage device, an electrically controlled three-way distribution valve, an electric heater, an electrically controlled flowmeter, a residual hot water supply pipe, a residual hot water return pipe, an electric water feeding valve, a water supply connector, an electric water return valve, and a water return connector. The barrel is provided with the water supply connector and water return connector at its bottom, and with the heating water pipe. The insulating layer is provided in interlayer of the barrel. The barrel cover is in sealed connection with the barrel and includes the hydrogen outlet interface.