In order to study the process and quality characteristics of laser welding red copper, this paper conducted laser welding on the sample by changing the laser power, welding speed, welding times, and surface treatment method, analyzed the connection quality from the aspect of weld surface morphology and weld width, and detected the temperature rise and resistance of the welding specimen under electricity. The results show that increasing laser power leads to a decrease in welding speed, expansion of weld width, reduction in resistance, and a slower rate of temperature rise. Optimum results were obtained when the laser power was set at 2000 W, the welding speed at 1.25 mm/s, and the number of welds at two. Further enhancement of weld surface morphology was achieved through polishing and blackening the surface. Under these conditions, the weld width was 0.669 mm, the resistance was at 1.645 μΩ, and temperature rose at the slowest rate.