Sub -base grader walking control system

The utility model discloses a sub -base grader walking control system, walking motor, left stopper, right traveling pump, right stopper, brake valve piece and manual braking relief valve piece including zuohang, setting up two -position three way switching -over valve on the brake valve piece, the actuator port A of two -position three way switching -over valve and the actuator port G of brake valve piece are connected, and two -position three way commutates the actuator port B of valve and the actuator port S of brake valve piece and is connected, and the actuator port G of the benefit hydraulic fluid port of left slippage pump or the benefit hydraulic fluid port of right slippage pump and brake valve piece is connected, and the actuator port S and the manual actuator port P1 who applies the brake the relief valve piece of brake valve piece are connected, left stopper and right stopper all with the actuator port P2 of manual braking relief valve piece connects, and the actuator port S1 of manual braking relief valve piece is connected with the oil tank. This sub -base grader walking control system can mend the unable stopper fuel feeding of giving of hydraulic fluid port at the traveling pump, when causing the brake block to unclamp, can realize dragging of paver and move.