Grouting pipe system based on cast-in-place pile

The utility model relates to the technical field of post-grouting construction, in particular to a grouting pipe system based on a cast-in-place pile, which comprises a reinforcement cage and a grouting pipe vertically mounted on the reinforcement cage, an auxiliary support used for mounting the grouting pipe is transversely arranged on the reinforcement cage, the bottom of the grouting pipe is 10cm-30cm longer than the bottom of the reinforcement cage, the bottom of the grouting pipe is sealed, and the grouting pipe is arranged on the reinforcement cage. A plurality of grouting holes are evenly formed in the pipe wall, 35-45 cm away from the bottom of the grouting pipe, of the grouting pipe, a plugging unit is arranged on the outer wall, at the grouting holes, of the grouting pipe, the plugging unit comprises a hole plugging layer and a sealing layer from inside to outside, the hole plugging layer comprises a plurality of hole plugging pieces used for plugging the grouting holes, and the sealing layer is arr