Power loss recycling device

The invention discloses a power loss recycling device. The power loss recycling device comprises a driving device and an energy storing device. The driving device comprises a power gear I, a primary drive shaft, a shifting slide gear II, a gear III, a gear IV and a gear V. The energy storing device comprises a secondary drive shaft, a gear VI, a gear VII, a roller, a rolling-sheet-type spring and a braking pad. The driving device cooperates with the energy storing device to transmit kinetic energy. By the aid of transmission among gears and power storage and release of the rolling-sheet-type spring, mutual transformation between kinetic energy and elastic potential energy can be realized; when motor vehicles need to be slowed down or stopped, kinetic energy of the running motor vehicles can be transformed into elastic potential energy to be stored; and elastic potential energy can be used when motor vehicles are started or sped up, so that energy conservation can be achieved and security assurance can be impr