The invention discloses a cooling groove and centrifugal combined magnetic liquid rotating and sealing device and belongs to the field of mechanical engineering sealing. The cooling groove and centrifugal combined magnetic liquid rotating and sealing device solves the invalidation problem caused by the reasons that the temperature of magnetic liquid is excessively high, centrifugal force exerted on the magnetic liquid is excessively large when an existing magnetic liquid sealing device is applied to occasions with large diameters and high revolving speeds. The cooling groove and centrifugal combined magnetic liquid rotating and sealing device comprises parts such as a shell, a pole shoe, a left rubber sealing ring, a right rubber sealing ring, the magnetic liquid, a coolant, a permanent magnet and an axial sleeve. According to the magnetic liquid sealing device, due to the fact that pole teeth are machined on a boss of the shaft sleeve and a cooling groove is formed in the pole shoe, and affection on the magnetic liquid by the centrifugal force and the temperature is lowered.