Hydraulic leveling system has been widely used in modern national defense and civilian technologies. The control of hydraulic automatic leveling is a complex nonlinear time varying system, and during hydraulic leveling, the "implicated coupling" problems between hydraulic legs as well as between the angle and legs would occur to the system. To solve this problem, the "surface-adjust surface" leveling technique was proposed by the leveling method. The method is based on the target surface with multipoint and multi-direction control by outputting control variables from leveling the relative position between leveling surface and target surface. The decoupling fuzzy controller of MIMO (multiple input multiple output) nonlinear dynamic solution was designed. In the leveling process, the coupling problem was solved and the multi-point adjustment was realized. Online application and experimental verification were in a certain type of special vehicle and a certain type of radar vehicle. The result shows that precise and rapid leveling of hydraulic overloading platform is perfectly realized.