Fabricated building energy-saving stair power generation stair

The invention relates to the technical field of intelligent manufacturing and assembly type buildings, in particular to an assembly type building energy-saving stair power generation stair which comprises a wall body, stair plates, stair steps and an energy transmission device, the energy transmission device comprises a gravity sensing strip, a driving head, a driving shell, a reset assembly and a power generation assembly, and the gravity sensing strip is fixedly connected with the stair steps; the driving head is rotationally connected with the gravity sensing strip, the driving shell is arranged on the driving head in a sleeving mode, the reset assembly is arranged on the driving head, the power generation assembly is arranged on the stair plate, and after the stair plate and the stair steps are installed, a human body walks on the stair steps, the soles step on the gravity sensing strip, so that the gravity sensing strip senses the gravity of the human body; the rotation of the driving head provides kinet