This paper presents a test method to the minimum torque of bubmersible motors by an oil filled prototype ,combining with its calculation of the functions ,and gets a right result to verity the computation theory.

• 结合潜水电机最小转矩的计算；以充油式潜水电动机为样机进行最小转矩的测试；从而验证理论与实践的一致性.