The metal channel letters are made of stainless steel, brass, tinplate, galvanized sheet, cold rolled sheet and other metal plates. The traditional welding methods of metal channel letters include electric welding, gas welding, argon arc welding, etc. because the traditional welding machine is easy to produce burn marks on the reverse side when welding thinner metal, and it is obviously deformed after burn, the use of thick metal plates is costly and heavy, It increases the difficulty of outdoor installation. The use of laser welding is different. The laser welding machine welding channel letters has little thermal impact on the material, will not deform the material, and the welding effect is also very beautiful.