The high-pressure sealed rotating water tail (water braid) is connected to the drill pipe, which has the characteristics of convenient connection, wear resistance, and good sealing performance. It can be used for coal seam punching and other operations. The product has a compact structure, small size, and light weight; In terms of internal structure, high-pressure bearings are used in the axial and radial directions respectively, making the operation smoother. The inlet and outlet water are designed with a direct flow, greatly reducing pressure loss; The shell adopts a one-time molding process to ensure that the shaft is not affected by the torque of the drilling rig, and is not prone to fracture, greatly increasing the service life of the product.