Protection screen of submerged arc furnace

A protection screen of a submerged arc furnace relates to a water cooling device of the submerged arc furnace. The protection screen comprises at least two protection screen assemblies. The protection screen assemblies are successively connected with each other so as to form a cylinder. The protection screen is characterized in that the each protection screen assembly is made of a whole piece of copper plate; at least one water channel is arranged in the copper plate. Compared to the prior art, by using the protection screen of the utility model, there are the following advantages that because the each protection screen assembly is made of the whole piece of copper plate in a forging and pressing manner and the water cooling water channel is generated through drilling holes on the copper plate, processing difficulty is reduced; damages, water leakage and other situations caused by too many parts and weld joints are avoided; a thermal conductivity of the copper plate is many times higher than that of a stainle