Fabricated aisle on foundation pit steel pipe supporting beam, manufacturing method and mounting method

The invention relates to the technical field of building appliances, and discloses a fabricated aisle on a foundation pit steel pipe supporting beam, which comprises a supporting beam, and an aisle mechanism is mounted on the outer wall of the supporting beam; the walkway mechanism comprises bases, a walkway plate and guardrails, the bases are arranged on the outer walls of the supporting beams in a sleeving mode, the walkway plate is installed on the tops of the bases, the guardrails are installed on the front side and the rear side of the top of the walkway plate, and after the multiple bases are erected on the supporting beams, the walkway plate is installed, so that the length of the walkway plate is matched with the length of the supporting beams; the base is arranged on the support beam, so that a worker can conveniently walk on the support beam, the guardrail is arranged on the walkway plate and used for walking protection, the base and the support beam are detachable, the base and the walkway plate ar