The saw blade often cracks, breaks up or vibrates during sawing steel. Aiming at solving this problem, laser quenching technology is adopted to treat the saw blade teeth instead of the general used heat treating method. because laser quench can make thinner quenched layer, finer crystal grain, higher hardness and better abrasion resistance, and the saw blade teeth can also maintain its good tenacity. When laser treating the saw blade teeth, by using metallography analysis, FEM simulation based on ANSYS, selecting appropriate laser processing parameters and strictly controlling the quenched area of the blade teech, the saw blades can be got with high abrasion resistance and high impingement resistance, consequently, which will reduce break-up, fracture or tip corrosion of the blade teeth. In addition, for the saw blade itself, besides the better sawing performance, its vibration and stability is still another problem which cannot be neglected. Laser hardening can change the stress distribution of the saw blade body, which is of significant influence on its vibration performance. If the technique is appropriate, which can improve its vibration property and ensure the sawing performance and decrease the noise. The effect of laser treating relies on the laser processing parameters, such as laser power and scanning velocity. Based on theoretical calculation and producing practies, by selecting appropriate laser processing parameters and the technique, the life-cycle of the saw blade can be prolonged and the sawing quality can be well guaranteed.