the present invention is to provide a horizontal balance control system of motor vehicle comprising a pneumatic conveyor operable to actuate hydraulic devices , links , and other mechanical elements for generating a restraint force among wheels in the same line or not in the same line , a control means is operable to activate the pneumatic conveyor for outputting compressed gas to increase pressure of a valve thereof and enable wheels in the same line or not in the same line to rotate toward the same direction . by utilizing this , discomfort of a driver and one or more passengers due to moving forward or backward while the motor vehicle is braking or accelerating is eliminated .