The invention relates to agricultural machinery automatic-driving equipment, in particular to a steering-wheel-typed agricultural machinery automatic-driving steering control device. The steering control device comprises a steering mechanism, an electromotor and a steering control unit. The steering mechanism comprises a transmission mechanism, a shell and a steering wheel installation structure the electromotor and the steering wheel installation structure are respectively arranged on the shell, the electromotor is in electric connection with the steering control unit, an output end of the electromotor is connected with one end of the steering wheel installation structure through the transmission mechanism arranged in the shell, and the other end of the steering installation structure is connected with the steering wheel of the agricultural machinery. The steering-wheel-typed agricultural machinery automatic-driving steering control device can execute steering instructions of other devices, is applicable for hydraulic type steering agricultural machinery and mechanical type steering agricultural machinery, is convenient and simple to install and is smart and efficient in executing steering action. The steering control device can automatically complete the steering operation required by the instructions and can be used for an agricultural machinery autonomous navigation system.