Reusable steel pipe micro pile

The utility model belongs to the technical field of foundation pit supporting piles, and particularly relates to a reusable steel pipe micro pile which comprises an outer pipe and an inner pipe arranged in the outer pipe, filler is arranged between the inner pipe and the outer pipe, a supporting piece enabling the inner pipe and the outer pipe to be kept coaxial is arranged in the outer pipe, a framework of a reinforcing structure is further arranged between the inner pipe and the outer pipe, and the reinforcing structure is arranged between the inner pipe and the outer pipe. The framework comprises a plurality of longitudinal ribs located on the outer side of the inner pipe and a plurality of annular ribs, the annular ribs are distributed in the longitudinal direction and connected with the longitudinal ribs, a plurality of pile pulling blocks are arranged on the outer side of the upper portion of the outer pipe, a plurality of reinforcing annular ribs distributed up and down are arranged on the longitudinal