Door lock with up-down linkage locking function

The utility model relates to the technical field of door locks, in particular to a door lock with an up-and-down linkage locking function, which comprises a door body, a handle is movably connected to the side surface of the door body, a turntable is movably connected to one end of the handle, two hinge buckles are fixedly connected to the outer side of the turntable, one end of each hinge buckle is movably connected with a connecting rod, and the other end of each hinge buckle is fixedly connected with a connecting rod. According to the improved door lock, the clamping groove is formed in the middle of the rotating disc, so that when the handle rotates, the rotating disc can be driven to rotate, and therefore a locking structure of a door is controlled; the two hinge buckles are symmetrically distributed so that the rotary table can drive the two hinge buckles at the same time, and therefore the up-down linkage effect is achieved, the air transmission structure enables the piston to drive the bolt column to