High-density polyethylene (HDPE) water supply pipe with long service life

The utility model discloses an HDPE (high-density polyethylene) water supply pipe with long service life, which particularly relates to the technical field of water supply pipes and comprises an outer pipe, a protective mechanism is sleeved outside the outer pipe, an inner pipe is slidably connected inside the outer pipe, one side of the inner pipe is connected with a mounting plate, a through hole is arranged inside the mounting plate, two bolt holes are arranged on the surface of the mounting plate, and the through hole is communicated with the through hole. Bolts are arranged in the two bolt holes, one end of each bolt penetrates through the outer pipe and extends into the outer pipe, and a nut is arranged at one end of each bolt. The strength of the protective pipe can be improved through the protective ribs, the outside of the protective pipe is protected, then the pipe can be protected from the outside through the protective layer, the impact resistance is improved, the overall strength of the pipe is e