According to the requirement of measurement of cylindrical thread gauge, the measurement system for measuring the diameter of cylindrical thread gauge with three coordinate measuring machine is verified. Cylindrical thread gauge diameter was measured, the measurement results of measurement results with two other methods to compare the experimental comparison, the results show that the three coordinate measuring machine screw gauge in the diameter measurement results meet the requirements of a predetermined size measurement technology, so the measurement system of three coordinate measuring machine for cylindrical thread gauge in.