The invention discloses a gravure printing machine and an ink cooling system thereof. The ink cooling system thereof comprises an ink printing mechanism and an ink cooling system, wherein the printingink printing mechanism comprises an ink groove, a scraper and a printing roller; the printing ink cooling system comprises a machine frame, a cooling tank, a stirring motor, supporting foot frames, supports, a condenser, a control main machine, an ink pumping pump I, an ink pumping pump II and a filtering cylinder; and the filtering cylinder, the cooling tank and the supports are sequentially installed on the machine frame from left to right. According to the machine and the system, a traditional printing technology is upgraded, the overall cooling system is a closed type, harmful gas is notdischarged into the air, the operation process is more environment-friendly, and no pollution is caused to the environment; after the cooling system is used, the problem that the temperature of the existing printing ink is high can be solved, the volatilization speed of a solvent can be reduced, the use amount of the solvent can be reduced, and the quality problems of products such as dry printingand dragging caused by high ink temperature are reduced as well, and green printing is achieved.