Based on femtosecond laser and UV laser processing technology, this paper studies the laser fine processing technology experiment of copper, aluminum and titanium. The experiment of cutting metal sheet by UV laser shows that the spot diameter of UV laser can focus to small size, the width of cutting seam is small; when processing metal materials with high melting point, there is serious slag splashing; aluminum sheet processing The plasma has a great influence on the surface of copper. The femtosecond laser single pulse has a large energy, the heat affected area of the micro groove processed is small, the surface is relatively smooth, there is no slag deposition, and the effect of micro groove edge processing has a good consistency; in the three kinds of metal materials, due to the large thermal conductivity of aluminum, the low melting point, the short coupling time of electronic lattice, the femtosecond laser processing aluminum sheet has the thermal effects of surface grain growth, crystal recasting, etc, The processing effect is worse than that of UV laser, but the processing effect of titanium and copper sheet is better than that of UV laser. The laser pulse width is the difference between the ablation of metal target by ultraviolet laser and femtosecond laser. The ablation time of UV laser is determined by the pulse width of laser, while that of femtosecond laser is determined by the relaxation time of electronic lattice. The metal is removed by melting and gasification, and the slag on the surface of the micro groove is easy to deposit. The femtosecond laser is removed by direct gasification, and its heat affected zone is smaller than that of UV laser.