The invention discloses a reversing mechanism. The reversing mechanism comprises a ratchet wheel shaft, a second gear ring, a first gear, a first gear ring, spline shafts and a third gear ring; the ratchet wheel shaft is provided with a first ratchet wheel and a second ratchet wheel, the first ratchet wheel is sleeved with the second gear ring, an inner ring of the second gear ring is provided with a first ratchet, the first ratchet is matched with ratchet wheel teeth arranged on the first ratchet wheel, the second gear ring is externally meshed with the first gear, the first gear is internally meshed with the first gear ring, and the first gear is provided with the first spline shaft; the first spline shaft is fixedly provide with a second gear and a third gear, the second gear is externally meshed with the first gear ring, the third gear is externally meshed with the third gear ring, an inner ring of the third gear ring is provided with a third ratchet, and the third ratchet is matched with ratchet wheel teeth of the second ratchet wheel. The reversing mechanism can convert bi-directional power obtained through back-and-forth swinging into power output unidirectionally to achieve the purpose of completely and continuously collecting energy.