The utility model relates to a heat sink for investment casting, it is interval including installation pole and the cooling of rigid coupling on the installation pole on the base upper surface of base, perpendicular rigid coupling, place the foundry goods that needs the cooling in the cooling interval, the interval ring of being placed by a plurality of layerings from bottom to top of airing exhaust of cooling is constituteed, and every airs exhaust the equal rigid coupling of ring on the installation pole, and a plurality of centres of a circle of encircling of airing exhaust all are locatedsame straight line, every its inside cavity structures that is of ring that airs exhaust is equipped with a plurality of air exits on every ring of airing exhaust, all connect branch's pipeline on every ring of airing exhaust, every bleeder is equal connection valves I on the road, and a plurality of bleeder great distances feed through a main line from the one end of the ring of airing exhaust jointly, and the main line is connected with the air pump, is close to the position connection valves II of air pump on the main line. A plurality of ring cold wind of all can discharging of airing exhaust, thus select the different ring work of airing exhaust alright in order to implement the cooling to foundry goods different position.