The invention discloses automobile steering angle transmission ratio inspection equipment, which comprises an automobile wheel marker and a steering wheel marker, wherein the automobile wheel marker is used for marking an included angle between axes of front and rear automobile wheels in an assisted manner; the steering wheel marker is used for marking a steering angle of a steering wheel; the automobile wheel marker has a marking mechanism, the marking mechanism comprises a base, a fixed shaft on the base, a first rod and a second rod, one end of the first rod is connected with front automobile wheels, the other end rotatably sleeves the fixed shaft, one end of the second is connected with rear automobile wheels, and the other end rotatably sleeves the fixed shaft. The automobile steeringangle transmission ratio inspection equipment marks the included angle between the axes of the front and rear automobile wheels by means of the first rod and the second rod, compares the included angle with the steering angle of the steering wheel obtained by means of the steering wheel marker, so as to detect whether a automobile steering angle transmission ratio is qualified, is simple in structure and convenient to operate, greatly simplifies the working steps of inspection, and improves the working efficiency.