The invention relates to a welding forming method of a liquid crystal display support, in particular to a method for welding the liquid crystal display support by means of advanced optical fiber laser. The method comprises the following steps that three sections of square tubes forming the support are placed on an automatic clamp and are in butt joint; and an optical fiber laser welding head is adjusted to reach the preset position, welding of a weld joint on the front face of the support is performed at first, the automatic clamp is driven to rotate by 180 degrees after welding is completed, and then welding of a weld joint on the back face of the support is performed. According to the technological parameters, optical fiber laser is continuous wave, the wavelength is 1064 nm, the laser power needed when a vertical weld joint and a flat weld joint are welded is 500-1000 W, the welding speed is 15-25 mm s<-1>, the laser power needed when a fillet weld joint is welded is 500-900 W, and the welding speed is 15-25 mm s<-1>. The method has the beneficial effects that compared with traditional welding methods, the laser welding defective rate of the liquid crystal display support is quite low, the automatic laser welding quantity production of the display support is achieved, the welding quality is ensured, the enterprise production efficiency is improved, and meanwhile the production cost of a single workpiece is lowered.