The invention provides a mechanical deceleration strip power generation device. The mechanical deceleration strip power generation device comprises a movement form converting part, a timing part and an energy-storage power generation part. The movement form converting part mainly comprises a deceleration strip, a return spring, a box, a rack, a gear ring, ratchet wheels, pawls, and a gear mechanism, wherein the rack is fixed below the deceleration strip, the gear ring is engaged with the rack, the ratchet wheels and the pawls are fixedly connected to the two sides of the gear ring, and the gear mechanism is fixedly connected with the pawls. The timing part comprises a clutch, a contact arm mounted on a disc, and a timing travel switch. The energy-storage power generation part comprises a volute spiral spring, an overdrive gear, a power generator and a storage battery. According to the mechanical deceleration strip power generation device, descending and ascending of the deceleration strip are converted into unidirectional movement through two coaxial ratchet wheel mechanisms in opposite directions, and the travel switch is used for controlling the clutch for combination and separation, so that the power generation time of the volute spiral spring is controlled, the purpose of energy recovery is achieved, and the energy utilization rate is increased.