Integral type hydraulic pressure 4 wheel driven driving system, its characterized in that hydraulic pump passes through the shaft coupling and links to each other with the power take off unit, the hydraulic pump oil inlet passes through the pipeline and links to each other with the hydraulic tank oil -out, the hydraulic pump oil -out passes through the pipeline and links to each other with switching -over valve oil inlet, the first switching -over hydraulic fluid port of switching -over valve passes through the pipeline and links to each other with first minute fuel tap, first minute fuel tap passes through the pipeline and links to each other with front axle motor and rear axle motor respectively, front axle motor and rear axle motor still divide the fuel tap to link to each other through pipeline and second respectively, the second divides the fuel tap still to link to each other through the second switching -over hydraulic fluid port of pipeline with the switching -over valve, switching -over valve oil -out passes through the pipeline and links to each other with the oil tank oil inlet, the utility model discloses can realize infinitely variable, no longer need frequently shift, avoid the navigating mate health tired because of frequently shifting, it is direct continuous with motor and transaxle, shortened the transmission distance, reduced the pilot process, improved transmission efficiency.