The invention relates to a hydraulic torque converter for a special transport vehicle. The hydraulic torque converter comprises a turbine body, a pump impeller body and a guide wheel body. Parameters of the turbine body, the pump impeller body and the guide wheel body are reasonably designed, so that bending moment is sufficiently absorbed when an engine rotates at a high speed, and the power is brought into full play when the engine rotates at the high speed, thereby reducing the loading cost and the using cost.