In this paper, this paper firstly tests the impact of belt drive on the headstock and machine tool under load environment which will bring loss, high friction and reduce machining efficiency. From there, this paper finds the reasons for these effects, analyzes the physical application context of them, changes the possibility of the problem occurring from the substance, and specifies the effects of eliminating heat dissipation, reducing noise, etc. while solving the belt drive problem, thus realizing further research on the integration of the headstock electromechanical turning and milling.