Abstract: A mechanical seal having an auxiliary cooling and lubricating device, comprising a sliding pairs, a mating ring, a sliding ring, a mating ring driving sleeve, a sliding ring retainer, a cartridge, a wave spring, a retainer, a bellow and a rubber cup; the mating ring driving sleeve is fixed on a shaft and the shaft drives the mating ring driving sleeve to rotate; the mating ring driving sleeve is provided thereon with multiple blades, the blades spinning a cooling medium around the mechanical seal toward the contact area of a sliding pair while the mating ring driving sleeve drives the mating ring to rotate so as to guarantee that the sliding pair is constantly in a lubricating and cooling state.