A primary-dedusting water cooling sleeve for dry quenching comprises a dust bin, wherein the bottom of the dust bin is communicated with dust discharging hoppers through at least two inner tubes, water jackets are arranged on the outer walls of the inner tubes, a water inlet and a water outlet are arranged at the upper end and the lower end of each water jacket, an upper dust dredging port of an upper gate valve is arranged at one end, close to the dust bin, of each inner tube, and a lower dust dredging port is arranged at one end, close to the corresponding dust discharging hopper, of each inner tube; a lower gate valve is further arranged at one end, close to the corresponding dust discharging hopper, of each inner tube, and an upper flange connector and a lower flange connector are arranged at two ends of each inner tube between the corresponding upper gate valve and the corresponding lower gate valve. After a coke powder cooling device is blocked or damaged, equipment can be maintained and replaced on line, a dry quenching system is not required to halt, continuous operation of the dry quenching system is guaranteed, a maintaining worker cannot contact with high-temperature coked powder, and potential safety hazard and the like in the maintenance process can be eliminated.