By focused on the static pressure support of camshaft connectingrod type low speed high torque motor with emulsion as working medium, the method of optimization design was adopted. The best emulsion film thickness, the bearing capacity and emulsion membrane stiffness were selected to be optimization objectives. The structure parameters of the static pressure support, damping tube diameter and length, the load pressure and the pressure drop coefficient were taken as design variables. By synthetically considering machining difficulty and the functional requirements of the motor, optimization results were obtained. It includes the damping tube diameter is 04 mm, the damping tube length is 40 mm, the pressure drop coefficient of the static pressure support is 085, and the best emulsion film thickness is 2 μm. The design can meet the functional requirements of the motor static pressure support structure.