The invention provides a bidirectional clutching bevel gear, which comprises a bevel gear body, a gear end cover, an inner ratchet and a bidirectional ratchet rod mechanism, wherein the bidirectionalratchet rod mechanism comprises left and right ratchet rods, a triangular block, left and right compression springs and a rocker arm, the left and right compression springs are kept in a compressed state, one side of each compression spring is pressed against the inner wall of the bevel gear body, and the other side of each compression spring is pressed against the corresponding ratchet rod. The triangular block can be deflected clockwise and counterclockwise under the action of the rocker arm, and the left and right ratchet rods are engaged with the inner ratchet in turn, so as to implement bidirectional clutching. The bevel gear achieves the functions of only forward rotation, only reverse rotation and idle gliding during the transmission process, and meets the special requirements of various special vehicles.