To achieve efficient thread pitch measurement, an area-based method is proposed to solve thread pitch measurement and evaluation based on the analysis of existing methods to solve thread pitch measurement by machine vision. The process starts by rotationally correcting the thread image to obtain the mid-diameter point using geometric relationships such as the area of the trapezoidal site of the tooth profile on the thread axis cross-section, then fitting the mid-diameter line using the least squares method, and finally combining this with the principle of inclusion to obtain the measured thread pitch. The data show that the area method is comparable to the average pitch measured by the contact gauge and the tool microscope, with a standard deviation of 0.9μm slightly greater than the standard deviation of 0.6μm measured by the indicator and much smaller than the standard deviation of 9.6μm measured by the tool microscope; the measurement efficiency of the area method is 1.9 times that of the indicator and 2.5 times that of the tool microscope. The area method is 1.9 times more efficient than the integrated measuring instrument and 2.5 times more efficient than the tool microscope.