A horizontal gear rubbing machine belonging to the technical field of gear rubbing machine tools, including the bed, front top piece, A rear top part, a sliding table part, a transmission part, a cooling part and a knife-loading part, and a frame part are divide into an upper bed and a lower bed, and that sliding table part are respectively slidably connected with the upper bed and the lower bed through a high-precision guide rail and a pressure plate, and knife-loading parts are respectively installed on the upper and lower sliding table parts, and the knife-loading parts can be equipped withvarious types of tooth-rubbing cutters, and can be used for single-section or multi-section tooth-rubbing; The high precision servo motors on both sides of the upper slide table are driven to make the upper and lower scuffing plates move relative to each other through the lead screw so as to achieve the purpose of machining splines. The screw rod adopts the hollow screw rod, the upper screw rod and the lower screw rod and the oil cooler to form a closed internal circulation, which ensures that the temperature of the screw rod is kept constant during the movement, and the screw rod does not deviate from the machining precision due to the thermal expansion; The utility model is controlled by a precision numerical control system, and has the advantages of high machining precision, simpler structure and more stable machining.