The invention provides a mechanical stationary seal ring, a mechanical rotating seal ring and a double mechanical seal composed of the mechanical stationary seal ring and the rotating seal ring, and belongs to the sealing technical field. The mechanical stationary seal ring comprises a circular stationary ring body, the side of the stationary ring body is of a stepped structure, a plurality of blind holes are evenly arranged on the upper surface of the lower end part of the stepped structure, the blind holes are internally provided with drive pins and little springs, an O-shaped seal ring is arranged on the external side of the upper end part of the stepped structure, and a stationary ring friction pair is arranged on the lower surface of the stationary ring body;

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