Currently, electric propulsion system is widely used in satellites to provide thrust for satellite movement. However, a TPAM (Thruster Pointing Assembly Mechanism) is required to adjust the position and attitude of the electric thrusters to achieve thrust vector adjustment. The TPAM used for the thrust vector adjustment of electric thrusters is vital, as it determines the thrust pointing accuracy, pointing adjustment range, and station keeping efficiency. This paper presents an innovative solution for electric thruster pointing adjustment by utilizing a mechanical arm in the TPAM. This paper presents an application method of mechanical arms as a TPAM, which can be applied to electric thruster pointing adjustment, including the position, and thrust vector adjustment of electric thrusters. This method can achieve north-south station keeping, east-west station keeping, and momentum unloading of a single vector regulating mechanism on the satellite. The fuel utilization rate (equal to station keeping) is no less than 90%, and the range of centroid tracking and momentum unloading is within a circle with a diameter of 0.2 meters in the working direction.