Abstract: To decrease the influence of clamping eccentricity on the measurement of involute profile,a measurement method of involute profile in the clamping eccentric state based on the gear measurment center is proposed.The influence of clamping eccentric on the measurement and evolution of involute profile is studied and the reasons for clamping eccentric error are analyzed.A computing method of clamping eccentric parameters is introduced and the clamping eccentric error compensation model is established.Experimental results show that the model can compensate for evaluation results to the state without eccentricity when the most allowed clamping eccentric value is not beyond three fourth of the probe's range,realizing accurate measurement of the involute profile and saving much time in adjusting the clamping eccentricity.Besides,the eccentric parameters attained by this method can also be used to adjust the measurement trajectory of tooth pitch and tooth spiral with clamping eccentricity.