Abstract: Disclosed is a cabinet door installation auxiliary device, which includes a support body, and a fixing unit and a lifting unit respectively arranged on both sides of the support body, wherein the fixing unit includes a bearing plate on the side of the support body, a locking block and a support plate, the bearing plate and the support plate are arranged in parallel, the support plate is provided with a locking unit for driving the locking block to move toward or away from the bearing plate, and the lifting unit includes a support block arranged on the other side of the support body, the support block is slidably connected to the support body in a longitudinal direction, and the support body is provided with a driving mechanism capable of driving the support block to move longitudinally.