Connecting mechanism of movable rail and side plate

The utility model provides a connecting mechanism of a movable rail and a side plate, which comprises a locking and separating assembly and a mounting clamping seat connected to the lower end of the side plate, the mounting clamping seat is provided with a horizontally unfolded flat plate part and a right-angle bent supporting part, the locking and separating assembly is fixed on the upper surface of the horizontal part, and the locking and separating assembly comprises a locking and separating block and a shifting block. The locking and separating block abuts against one end of the supporting part, a movable groove is formed in the locking and separating block, a pin shaft is arranged in the movable groove, the shifting block is rotationally connected into the movable groove through the pin shaft, an L-shaped clamping hook is arranged on one side of the locking and separating block, and an elastic rod driving the shifting block to rotate outwards around the pin shaft is arranged on one side of the shifting b