The utility model provides a ware is demolishd to beam -pumping unit fluid coupling ware for supplementary will the connection is demolishd at the epaxial fluid coupling ware of reducer output, including connector, ejector pin and revolving member, it is inboard that the connector can overlap the pressure cover of locating the fluid coupling ware to with pressure cover looks threaded connection, the connector inboard is located to the ejector pin cover to with connector looks threaded connection, the tip of the one end abut against reducer output axle of ejector pin, the revolving member is connected with the other end of ejector pin mutually to can drive the ejector pin and rotate, the revolving member rotates to the first direction by the drive ejector pin, and force the connector to drive and press the cover to rotate to the second orientation and move to the orientation of keeping away from the reducer output axle simultaneously, first direction and the 2nd opposite direction, first direction and second orientation are clockwise or anticlockwise. The utility model discloses a beam -pumping unit fluid coupling convenient operation, safety is effective, can demolish the fluid coupling ware fast from reducer output is epaxial.