With the rapid development of welding technology,it is more and more important for the detection of its welding process. As is known to all,besides welding power source,automatic and semi-automatic welding qualities are also affected by the reliability and stability of wire-feeding system directly. The design of speed measurement based Hall speed sensor has realized the real-time display and storage of wire-feeding speed. Analyzed the principle of speed measurement,use the Hall sensor which has the fast response and high measurement precision,combineding with the SCM circuit,a new speed measurement system was designed. Therefore,this study designs a upper computer software based on Lab VIEW. The system has the advantages of low cost,high reliability,fast speed and wide measuring range.