The invention discloses a novel hydrogen power generation device which comprises a tank A fixedly arranged in a support. A reaction chamber is arranged in the tank A; a transmission cavity A located in the tank A is arranged on the left side of the reaction chamber; a switch valve A and a switch valve B are arranged in an upper end wall of the reaction chamber in a communicating way; a pipeline Aupwards extending out of an external space is arranged on the upper end surface of the switch valve A in a communicating way; a pipeline B upwards extending out of the external space is arranged on the upper end surface of the pipeline A in a communicating way; the pipeline A and the pipeline B communicate with an external water treatment system; a switch valve C and a switch valve D are fixedly arranged in a right end wall of the reaction chamber; and a pipeline C upwards extending out of the external space is arranged on the right end surface of the switch valve C in a communicating way. Thedevice provided by the invention is simple in structure and convenient to use; and the device adopts an oxygen-hydrogen combustion effect to drive a connecting rod mechanism to move, so that the device has a power generation function and a power output function, and the utilization efficiency of hydrogen energy is effectively improved.