Steel bar cutting tool for house construction

The utility model discloses a house construction reinforcing steel bar cutting tool, including shell, also including cutting mechanism and change mechanism, cutting mechanism specifically consists of servo motor, slide rail, push block, reciprocating screw rod and extension rod, the inner wall of shell is equipped with servo motor, the inner wall of shell is equipped with the slide rail, the push block is equipped with the reciprocating screw rod, and the extension rod is equipped with the push block. A reciprocating lead screw is rotatably connected to one side of the inner wall of the shell in a matched mode, a pushing block is slidably connected to the surfaces of a sliding rail and a servo motor in a matched mode, an extension rod is welded to one side of the surface of the pushing block, and the replacement mechanism is specifically composed of a fixing bin, a threaded groove, a spring, a contact block, an inserting groove, a cutter, a threaded rod and a protruding block. A fixing bin is welded to one si