The invention relates to a method for repairing fusion holes in a wall of a carbonization chamber without cooling and belongs to the technical field of coke furnace repairing. The method has a technical scheme that an operator repairs a wall of a carbonization chamber without entering into the carbonization chamber; and in repairing, the operator uses a detection tool to detect fusion hole positions and carries out spray repairing from a vertical flame path on a furnace top to the interior of the carbonization chamber so that fusion holes in the wall are repaired with mud gradual solidification and thus the method breaks through a thinking way of wall repairing from a combustion chamber to a carbonization chamber, overturns the traditional method of repairing a furnace wall of a carbonization chamber, shortens repairing time and prolongs a coke furnace service life. The method provided by the invention has the advantages that a repairing rate is fast; a normal production order is not influenced; carbonization chamber wall repairing does not need cooling so that a coke furnace service life is prolonged; the method thoroughly overturns a thinking way of wall repairing from a carbonization chamber; a spray gun structure is modified so that the spray gun structure is more suitable for carbonization chamber fusion hole repairing; an application range of a semi-drying spray repairing device for spray repairing of a carbonization chamber wall is widened; and a baffle plate avoids spray repairing material splashing in spray repairing and improves a spray repairing rate.