Trackless rubber -tyred car hydraulic pressure traveling system, its characterized in that hydraulic pump pass through pipeline and hydraulic tank and link to each other, and the hydraulic fluid port that pumps of hydraulic pump links to each other with the valve oil -out through the valve oil inlet of pipeline with the flow divider respectively with the blowback hydraulic fluid port, still is provided with two branch hydraulic fluid ports and two valve oil return openings on the flow divider, and two branch hydraulic fluid ports pass through the pipeline and link to each other with back hydraulic motor's oil inlet with preceding hydraulic motor respectively, two valve oil return openings pass through the pipeline respectively with preceding hydraulic motor after with hydraulic motor's oil -out continuous, preceding hydraulic motor and back hydraulic motor link to each other with front -wheel drive axle and rear drive axle respectively, the utility model discloses an individual hydraulic pump passes through two hydraulic motor of flow divider drive and realizes the 4 wheel driven function, and the hydraulic oil distribution is average, and each motor power is balanced, and the walking is steady, and the security is high, it can not normally circulate the time, through giving solenoid valve powered on, moves movable valve element and makes the direct intercommunication of baffle both sides cavity shape structure to break down hydraulic oil at the hydraulic pump.