It is difficult to formulate exact mathematical model of hydrostatic transmission due to nonlinear and time-varying characteristic, thus fuzzy control was performed to the system. To improve the traditional fuzzy controllers, a novel fuzzy control scheme was studied. By generating a new compensation amount with the product of original one and its absolute value, a fuzzy controller with variable scale factor was formed. The simulation and test results showed that the new controller can achieve high speediness response, restrain the overshoot effectively and obviously improve the dynamic and static characteristics of the system. It is suitable for the high speed tracked vehicle hydrostatic transmission.