Automatic gear shifting device and locking mechanism thereof

The utility model discloses an automatic gear shifting device and a locking mechanism thereof. The automatic gear shifting device and the locking mechanism thereof comprise a gear shifting mechanism and a P gear locking mechanism, wherein the gear shifting mechanism comprises a gear shifting bar used for gear shifting and a gear panel, the P gear locking mechanism comprises a locking positioning block, an electromagnetic controller and a manual-operated unlocking mechanism, the gear shifting bar is limited at a locking position by the locking positioning block, the electromagnetic controller controls the locking positioning block to be switched between the locking position and an unlocking position, and the locking positioning block is limited at or released from the unlocking position by the manual-operated unlocking mechanism. The automatic gear shifting device and the locking mechanism thereof are simple in structure, low in manufacturing cost, convenient to assemble, quick in execution, and good in reliability and coherence.