<p>Based on the advantages of low energy input and small heat-affected zones during pulse laser processing, this paper presents experiments on pulse laser brazing of diamond grinding wheels. The study investigates the influence of various pulse laser parameters on the degree of thermal damage to diamond particles and reveals the wear characteristics of diamonds under different thermal damage levels. Using Raman spectroscopy, the thermal damage to diamond particles was quantitatively evaluated, and the energy threshold for diamond damage was analyzed. The results indicate that the degree of influence of various process parameters on diamond thermal damage is ranked from high to low as follows: laser power &gt; pulse width &gt; pulse frequency &gt; scanning speed. When the peak power density exceeds the energy threshold for thermal damage, the damage to the diamond significantly increases. Changes in pulse frequency, pulse width, defocus amount, and powder thickness will affect the energy density absorbed by the material, thereby altering the degree of thermal damage to diamond during brazing. Grinding tests on the brazed wheel samples showed that the greater the thermal damage to diamonds, the shorter the time the abrasive particles maintain a high wear ratio, and the more easily they break. At lower energy density input, diamonds in the surface layer of the laser brazed sample are prone to fall off, while the internal diamonds, due to their lower thermal damage, exhibit better grinding performance.</p>