Abstract: The wire electrical discharge machining（WEDM） experiment of Ti-6Al-4V titanium alloy was carried out.The influence of electrical parameters on the material removal rate and surface roughness was studied. The orthogonal experiment was designed to analyze the influence of various factors on the material removal rate and surface roughness. The results show that with the increase of pulse width, the material removal rate first increases and then decreases, and the surface roughness increases. Both material removal rate and surface roughness decrease with the increase of pulse interval ratio.The pulse width has the most significant effect on the material removal rate and surface roughness. The multiple cutting process can effectively reduce the thickness and roughness of the surface resolidification layer, which is good for improving the fatigue life of the machined surface. The reaction film produced in the process of WEDM can make the machined surface colored, and the color varies with the thickness of the reaction film. By changing the electrical parameters, the surface of WEDM can be colored differently.