The invention provides a converter fume hood accumulated residue cleaning method applied to the technical field of steel smelting converter production. The converter fume hood accumulated residue cleaning method comprise the cleaning steps that the interior of a converter fume hood is subjected to oxygen blowing through a converter fume hood accumulated residue cleaning gun and accumulated residues fall down from the interior of the converter fume hood; an operator continues to carry out the oxygen blowing, at the same time a converter is shaken to be in an inclined state, and when no accumulated residues fall down from the interior of the converter fume hood, the oxygen blowing is stopped; the converter is shaken to an initial position before being in the inclined state, nitrogen blowingis carried out in the converter fume hood through the converter fume hood accumulated residue cleaning gun, and remained accumulated residues peel off in the converter fume hood; and the operator continues to carry out the nitrogen blowing, at the same time the converter is shaken to be in the inclined state, and when no remained accumulated residues fall down in the converter fume hood, the oxygen blowing is stopped. The converter fume hood accumulated residue cleaning method is simple in step; and on the premise that other equipment investment and energy source and fuel consumption are not required and fume hood water cooling tubes are free from damage, the accumulated residues in the converter fume hood are cleaned safely, effectively and rapidly, the converter is prevented from stopping, and the converter operating rate is raised.