Fluid pipeline ready -packaged joint

The utility model relates to a fluid pipeline ready -packaged joint. The ready -packaged joint includes first coupling and second coupling, and the second coupling is equipped with the passageway that is used for holding the drum portion of second coupling including the drum portion that is arranged in inserting first coupling, first coupling, is equipped with the sealing washer in the passageway, when the second coupling inserted first coupling, the sealing washer clamp was between passageway inner wall and drum portion outer wall, between passageway inner wall and the sealing washer, be the tight fit between drum portion outer wall and the sealing washer, the second coupling insert first coupling insert the direction on, drum portion outer wall has and is greater than zero tapering and the front end external diameter of drum portion is littleer than rear end external diameter. The utility model discloses a do the tapered shape of banding with the drum portion of second coupling for the second coupling can pass the sealing washer hole in the first coupling more easily, has so both guaranteed the leakproofness, also can make the second coupling easily to install.