Rotation wellhead hydraulic packer

The utility model discloses a rotary wellhead hydraulic blockage, which belongs to the field of wellhead equipment of oil/gas fields and comprises a hollow upper joint rotator and a hollow lower joint rotator interconnecting axially via threads, a cylinder body is provided sleevedly between the upper joint rotator and the lower joint rotator, two ends of the cylinder body are respectively fixed to outer rings of two shaft bearings sleeving the upper joint rotator, upper part of the cylinder body is provided sleevedly with a cylinder casing, the cylinder casing and the cylinder body have matching steps, the step bridged large-diameter and small-diameter sections of the cylinder casing are respectively in seal connection with the cylinder body, step surfaces of the cylinder casing are provided with a ring oil groove, the cylinder body has an axially positioned hydraulic oil channel communicating with the ring oil groove, lower end of the cylinder body connects fixedly with a rubber cylinder support, between the rubber cylinder support and the cylinder casing has at least one rubber cylinder sleeving the cylinder body. The sealing between the hydraulic driving rubber cylinder and the surface casing has excellent movable sealing performance, simple structure, convenient rubber cylinder replacement as well as reliable and convenient wellhead sealing.