Building foundation reinforcing pile

The utility model discloses a building foundation reinforcing pile which comprises a reinforcing pile body, a containing cavity is formed in the reinforcing pile body, a supporting sleeve is arranged in the middle of the bottom end of the interior of the containing cavity, and supporting plates are symmetrically arranged at the bottom end of the side wall of the supporting sleeve of the containing cavity. Connecting rods are connected to the top ends of the sides, away from the supporting sleeves, of the two supporting plates, lantern rings are connected to the top ends of the two connecting rods, through grooves communicating with the containing cavity are symmetrically formed in the side wall of the reinforcing pile body, and a conical inserting rod is movably connected between each lantern ring and the adjacent through groove. And one ends of the two conical inserting rods penetrate through the through grooves and the lantern rings and extend into the containing cavities to be connected with movable blocks