The invention discloses a coke oven combustion chamber furnace wall hot-repair coal gas hole dredging-cleaning method and tool. A basement coal gas horizontal pipe is closed, and a stirred grouting material is uniformly poured into 1-32 flame path brick gas holes at a NO09-layer brick coal gas hole of a combustion chamber, a chute dredging-cleaning tool is inserted into the brick coal gas holes after the material to be grouted penetrate into a chute area, the surfaces of the brick coal gas holes are repeatedly scraped up and down, then a coal gas horizontal pipe plug is opened to discharge theexcessive grouting material, and the method is used for circular and repeated grouting from the NO09-layer brick coal gas hole. The problems of chute blowby in coke oven hot repair, surface coarseness of the brick coal gas holes and cracking of the brick coal gas holes are solved.