Abstract: In order to overcome the limitations of fillet weld shape dimension by manual inspection, an inspection method based on laser vision sensing is adopted.Firstly, a laser stripe image is acquired with a laser vision sensor based on principles of optical triangulation. Then the acquired laser stripe image is processed by medium filter, binary processing, laser stripe centerline extraction, and feature recognition algorithms.At last, the information about weld shape dimension is obtained.The experiments show that compared with manual inspection method, the method is much more accurate and reliable to inspect, convenient to use, and the inspection time is greatly shortened, the inspection items are increased obviously, the difference depending on user can be eliminated, and inspection data can be saved in PC.