The invention discloses a locking mechanism which is used for locking an upper cover of a container on a container side plate. The container comprises a base, the upper cover and side plates, wherein the upper cover is provided with a safe edge. The locking mechanism comprises a locking piece, a driving piece, a resetting piece, lock holes and a groove, wherein the lock holes are formed in the outer side of at least one side plate, and the groove is formed in the upper cover; one end of the locking piece is arranged in the groove, and the other end of the locking piece is provided with a lock head; the lock head penetrates through the safe edge and can extend into one of the lock holes along a direction vertical to the corresponding side plate, so that the upper cover is locked to the corresponding side plate; the driving piece is arranged in the groove and is used for driving the locking piece to perform unlocking, and the resetting piece is arranged in the groove and is used for resetting the driving piece after unlocking is finished. According to the container and the locking mechanism, the transportation cost and the storage cost can be lowered and the labor intensity of operators is alleviated.