Locking device for combined wheel carrier of electric folding bicycle

Disclosed is a locking device for a combined wheel carrier of an electric folding bicycle, comprising a front handle frame (1), pedals (2), a seat supporting bar (3) and a rear wheel carrier. The front handle frame and the pedals are movably connected, the seat supporting bar and the pedals are movably connected, and the rear wheel carrier is movably connected to a bottom face of the pedals. A movable rotating part of the rear wheel carrier is provided with a hook groove (5), a locking hook (6) is connected to the bottom face of the pedals via a rotating shaft and an operating handle (7) thereof penetrates upwards through a top face of the pedals, and the locking hook is adapted to the hook groove and is snapped into the hook groove to be locked when extending to a proper position. The locking device according to the present invention has a stable structure and can prevent accidental opening, and the folding of the seating supporting rod can be linked with the unlocking of the rear wheel carrier, and operation is convenient.