The reasonable introduction of computer programming in physics experiment teaching can not only deepen students＇ understanding of experimental principles and data processing but also stimulate their interest in exploration．The measurement of laser wavelength using a Michelson interferometer is an important learning unit in the course of " College Physics experiment"，and it also has high research and application value．However，traditional experimental operations are prone to errors caused by inaccurate recording of the number of moving stripes．In response to the above shortcomings，this article innovatively combined Tracker software to optimize the process of identifying the number of interference fringes，which greatly improved the experimental accuracy;In addition，using the least squares method instead of the differencing method to fit the data further improves the accuracy of data processing．The method proposed in this article has certain reference significance for the improvement of other physics experiments and the digital construction of laboratories．