The invention discloses a coal gas dust removal system for low-moisture coal coking, which comprises a coal gas washing tower connected with a primary cooler, and the coal gas washing tower is provided with a first nozzle for spraying a washing liquid to coal gas fed into the dust removal system. The coal gas dust removal system for low-moisture coal coking disclosed by the invention reduces the amount of dust entrained in coal gas by way of circulating washing, thereby reducing the influence on a subsequent coal gas purification system as far as possible.