The utility model discloses an independently adjust formula hydraulic shock absorber, this bumper shock absorber include outer shell, inner casing, vibration absorbing shaft, from main regulator valveand floated piston assembly, internal cylinder sleeve connects in the outer shell, install in the inner casing in proper order from main regulator valve and floated piston assembly are supreme underby, back in floated piston assembly is fixed to vibration absorbing shaft's lower extreme, can contact from main regulator valve and vibration absorbing shaft's lower end and be connected, be providedwith a filling oil valve piece, the row of benefit oil piston and first oil extraction valve block on the floated piston assembly, be equipped with the 2nd filling oil valve piece on main regulator valve. The utility model discloses it is particularly outstanding that the ground performance is grabbed to whole car bumper shock absorber stationarity, four -wheel, and the four -wheel increases withthe coefficient of friction on ground, has obvious brake performance and improves.