The invention relates to a simple three-dimensional garage, and belongs to the field of vehicle parking equipment. Particularly, the simple three-dimensional garage adopts a connecting rod sliding block transmission mechanism, and a sliding block drives a vehicle carrying plate to drive lifting. The simple three-dimensional garage comprises a power transmission part, a triangular frame body, a first connecting rod transmission part and a second connecting rod transmission part. The power transmission part and the connecting rod transmission parts are adopted, a motor rotates to drive a chain of a chain wheel and gear mechanisms to move, torque is transmitted to a driven gear, the driven gear is fixedly connected with a driving shaft, the driven gear transmits torque to a driving connectingrod, the power transmission part adopts the gear mechanisms in many places to realize deceleration and can form self-locking when the gears stop rotating, collapse of an upper garage is prevented, hand brakes are arranged on revolute pairs of supporting connecting rods, and mechanical protection is achieved; and the connecting rod transmission parts are provided with a plurality of connecting rods to adjust stress during operation, starting connecting rods are provided with sliding shafts and installation slide blocks, the sliding shafts are installed on sliding grooves of triangular frame bodies, and the installation slide blocks drive the vehicle carrying plate to run according to a fixed sliding groove track steadily and reliably.