Abstract: Diode soldering experiments of rectangular chip resistor components were carried out using Sn-Ag-Cu lead-free solder, the mechanical properties of the micro-joints were studied by STR-1000 micro-joints tester.The results indicate that as the laser soldering time is fixed, the shear force of chip resistor micro-joints becomes largerwith the increase of laser output power, and the shear force is the largest at a optimum power.With the increase of laser soldering time, the optimum power decrease, and 1s is the best laser soldering time.Competitive experiments results show mechanical properties of chip resistor micro-joints soldered with laser soldering system is better than that of chip resistor micro-joints soldered with IR reflow soldering method.