Abstract: A lock mechanism with an ice breaking mechanism. The lock mechanism is composed of a lock ring, an engagement plate, a pawl, a shaft, an engagement plate driving rod, a pawl release lever, a release lever, a support, a swinging claw, a tensioning wheel, a cable, a pulley, a limiting member, a supporting arm, a fixed shaft, a pull rod, a spring, a swinging ice breaking arm, an ice breaking pull rod, and the like. The lock mechanism is provided with the ice breaking mechanism. The ice breaking mechanism may be started to push a vehicle door away by a specific distance, so as to assist in manually or automatically opening the door, which improves the degree of satisfaction of customers.