The utility model discloses a mechanism for optical flat burnishing machine cooling system, mainly used optical flat burnishing machine correct grinding and the cooling of polishing. Main technical scheme is: by mid -game and lower wall sealing connection, the lower wall bottom bonds to insulate against heat and encloses, installs a manger plate circle outside lower wall and the thermal -insulated circle, 8 - 14 fan -shaped circulating slots of equipartition in the mid -game, fan -shaped circulating slot both sides have an intake chamber respectively and go out the basin. The utility model discloses identification on probation: the former mechanism coolant liquid of having eliminated fundamentally flows, and the stroke is long, the inhomogeneous phenomenon of mid -game temperature, makes the precision quality of work piece can ensure that the effectual production efficiency that has improved satisfies the requirement of existing production.