The invention relates to the technical field of hot repair of coke ovens, in particular to a protecting method of combustion chamber ramps for hot repair of a coke oven. Holes are formed in the end walls of ramp areas at the machine side and the coke side of the coke oven, ramps of the ramp areas at the machine side and the coke side of the coke oven are exposed, sliding rails and ash receiving boards are sequentially arranged on the ramps in the holes, and then a ceramic fiber rope is putted at a ramp brick gas hole towards an observation hole in each vertical flue of the combustion chamber,so that ramp inlets can be effectively protected, bricks are prevented from falling off to block the ramps, the conditions that the ramp brick gas holes and regenerative lattice bricks are blocked after the vertical flues are repaired are prevented, and further the workloads of manually cleaning the ramp brick gas holes and a blocked regenerative chamber are avoided; in addition, the protecting method has the advantages of low cost, convenience in operation, wide application range and high practicality.