The invention relates to the technical field of industrial furnace cooling equipment, in particular to a method for maintaining an industrial furnace cooling wall. A cooling sleeve which clings to the cooling wall closely is arranged in the cooling wall of a furnace; a cooling medium is input in the cooling sleeve through a medium input pipeline; and the cooling medium enters the cooling sleeve to bring away the heat of the cooling wall, and is output through the medium output pipeline so that the heat of the cooling wall is continuously brought away. The method has the beneficial effects that the structure is simple; assembly operation is simple and convenient; the heat of the cooling wall is continuously brought away through close clinging of the cooling sleeve to the cooling wall, so that cooling capacity of the cooling wall is recovered; stability and safety of operation of the industrial furnace are improved; and production loss is lowered.