The invention relates to a control device for a rotary kiln tug, which comprises a rotary kiln DCS system, a rotary kiln hydraulic station, a PLC, a relay controller, a tug hydraulic electromagnetic valve and a rotary kiln hydraulic cylinder, wherein the rotary kiln DCS system adopts a DCS automatic control system and a remote upper computer configuration software of German SIEMENS Company to control the rotary kiln tug; the rotary kiln hydraulic station comprises a main hydraulic pump, a standby hydraulic pump, a circulation cooling pump, a field operation box and an electric heater; the PLCis electrically connected with the rotary kiln DCS system and the relay controller respectively for programming and controlling the relay controller and reporting and transmitting control commands ofthe rotary kiln DCS system; the relay controller is electrically connected with the tug hydraulic electromagnetic valve and controls the rotary kiln hydraulic cylinder through the tug hydraulic electromagnetic valve; the tug hydraulic electromagnetic valve is arranged in an oil passage of the rotary kiln hydraulic cylinder; and a cylinder body is hinged with a kiln frame, and a piston is hinged with the rotary kiln. The device can realize DSC automatic control for the rotary kiln tug, realizes humanized management, and can be produced continuously.