Abstract: In order to ensure that the lifting force of the clamping friction overspeed governor can meet the needs of the safety gear, the lifting force of the clamping friction overspeed governor should be calculated and analyzed. Simplify the calculation model of lifting force of clamping friction overspeed governor, and get the simplified calculation result of lifting force. The finite element modeling is established, the transient dynamic analysis is carried out, and the calculation results of stress and displacement are obtained. This paper analyzes the relationship between the lifting force and clamping force, and summarizes the related factors affecting the lifting force of the clamping friction overspeed governor, takes corresponding preventive measures, and provides corresponding references for the maintenance and inspection of overspeed governor and safety gear.