Abstract: Aiming at the problems of high-temperature molten metal extraction technology in the production of rare earth molten salt electrolysis, a pot-lifting manipulator was designed, and the force and deformation of the manipulator were analyzed by using simulation software. The simulation model of manipulator was built under SolidWorks environment, and transferred into the COMSOL Multiphysics software, the communication interface is compatible. According to the production process of Pr-Nd metal, the test boundary was determined. Taking the distance of nut driven by torque motor as the control variable, the process of extracting crucible by manipulator was co-simulated, under meeting the requirements of the stress and deformation of the manipulator extracting the crucible, the appropriate size of the manipulator clamping rod was obtained. The results show that when the diameter of the gripping rod of the manipulator is 22 mm, which can meet the required gripping force, the maximum stress is about 9×10⁷ N·m⁻², the deformation of the lower part of the clamping rod under high temperature is about 4.7 mm, and when the clamping claw contacts the crucible, the deformation of the contact area between the clamping rod and the high temperature liquid level is about 5.2 mm. The deformation caused by high temperature is about 2.5 mm, the deformation caused by transverse force is about 2.7 mm, and the deformation at the joint of clamping rod and connecting rod is about 7.75 mm. The design parameters of the manipulator can meet the working requirements.