A quick connecting and locking mechanism comprises a sliding groove (1), a lifting handle (2), a connecting rod (3), a spring (4) and a loop (5), the lifting handle (2) is pulled upwards to enable thespring (4) to be compressed to generate pre-tightening force, and meanwhile the bottom of the connecting rod (3) is exposed. The bottom of the connecting rod (3) slides into the clamping groove of the sliding groove (1); and when the handle (2) is loosened, the handle (2) is clamped into the clamping groove of the sliding groove (1) by the pre-tightening force of the spring (4). The quick connecting and locking mechanism is less in degree of freedom, stable after connection and not easy to loosen; only two steps of lifting and sliding are needed, and the connection is rapid.