The invention discloses coating vacuum cavity welding auxiliary equipment for LOW-E glass production, and belongs to the technical field of glass production and manufacturing. The coating vacuum cavity welding auxiliary equipment comprises a glass mounting base and a main mounting frame, and side supporting bases and a base are fixedly mounted on the outer walls of the two sides of the main mounting frame correspondingly; an air bag and a material storage assembly are arranged on the side supporting bases and the base and located on the outer surface of the main mounting frame correspondingly, an air guide pipe is arranged at the top of the air bag, and a square guide pipe is fixedly mounted at the top end of the air guide pipe; according to the equipment, the material storage assembly and the air bag are arranged outside, through the design, no electronic structure is used, automatic timing spraying of the welding anti-splashing agent is achieved, the problem of splashing of some materials in a high-temperature welding area can be effectively solved, the construction safety of workers is effectively guaranteed, meanwhile, the connection tightness of the welding area is higher, the welding surface is not prone to erosion, the welding effect is improved, the step of manually adding a welding splash-proof agent is omitted, the process efficiency is improved, and operation is easy.