The utility model provides a rotary cooling furnace for dry quenching of semi-coke, wherein a feed sealing device is arranged at the front end of a barrel body; a water spraying jacket is arranged at the front section of the barrel body; a discharge tank is positioned at the rear section of the barrel body; the discharge tank and the barrel body are sealed by a fish scale sealing manner; a heat exchanging system is arranged in the barrel body; a plurality of rows of pipe racks are arranged in the barrel body, and each row of pipe racks is divided into a plurality of blocks which are arranged on the inner wall of the barrel body in a staggered manner. The rotary cooling furnace disclosed by the utility model has the advantages of improving the quality of semi-coke, protecting the environment and saving energy sources.