The foaming slag practice can effectively solve the problems existing in EAF smelting of stainless steel,such as high electrical consumption,high refractory consumption and long tap to tap time.In this paper,theoretical analyses were made on the technical difficulties and development feasibility of the technology.Slag foaming experiments were performed in a 10t EAF where crude stainless steel with a Cr content of 13％ - 15％ and a carbon content of 1.5％ - 2.5％ was smelted and special foaming pellets were added to release additional gas for better foaming.Good foaming slag was observed with the electric arc fully covered by the foam when the content of Cr2O3 is between 7％ - 12％.The industrial scale experiments were performed in a 110 t EAF by the use of the same foaming pellets.Compared with the traditional operation,these experiments resulted in better foaming effects.