The invention discloses a cylinder sleeve base body cooling device. A cooling mechanism comprises a first motor and two transmission mechanisms. The two transmission mechanisms are located on the two sides of a rack. Each transmission mechanism comprises a plurality of chain wheels, chucks and a chain, wherein the chain wheels are rotationally connected to the rack, at least two chain wheels are located on the top of the rack, and the center connecting line of the chain wheels is parallel to the horizontal plane. The chains are in transmission connection to the chain wheels. The chucks are connected to the chains. Each chuck is provided with an inserting groove for a cylinder sleeve base body to penetrate. Every two opposite chain wheels are connected through a transmission rod, wherein one chain wheel is driven by the first motor to rotate. The center connecting line of the opposite inserting grooves is parallel to the axial direction of the cylinder sleeve base body. The disclosed cylinder sleeve base body cooling device can effectively cool the cylinder sleeve base body, and the mechanical performance of a machined cylinder sleeve is guaranteed.