A lifting and overturning type automatically-locked pet cage door includes a lifting handle, a hook shift liver, a spring, a rotting shaft and a pair of guide rails. The lifting handle is rotatably fixed on the upper end of a door body, and the hook shift lever is fixed on a crossbar above the door body when the cage door is closed, the hook shift lever hooks the upper end of the door body under the action of the spring to realize locking when the cage door is opened, the door body slides upwards along a pair of guide rails to drive the hook shift lever to rotate, and slides upwards to the maximum displacement position after being separated from the hook shift lever, and the door body rotates along the rotating shaft and is laid on the top of the pet cage.
