Scrap preheating and continuous charging arc furnace takes advantage of high temperature flue gas in the forth hole to heat the furnace charge. Furnace charge into the preheating period meets furnace flue gas reversely. The furnace Horizontal scrap preheating temperature reaches over 5000 degree. Per tonne steel saves electricity 80-100kwh. Operation of continuous charging arc furnace reduces the content of feo in the residue and the loss of metal in slagging-off. Metal yield can be increased 1.5-2% and the metal yield can reach to 94%. During the operation of continuous charging arc furnace, molten pool is in the state of refining continuously. Intense and continuous reaction between molten pool and residue makes sure the low content of feo. Due to the function of c Container