Fair-faced concrete stair step reinforcing construction device and using method thereof

The invention discloses a bare concrete stair step reinforcing construction device and a using method thereof.The bare concrete stair step reinforcing construction device comprises a supporting mechanism, the supporting mechanism comprises a first bottom plate, an extension plate is inserted into one end of the first bottom plate, a second bottom plate is inserted into one end of the extension plate, and a first side plate is slidably inserted among the top of the first bottom plate, the top of the extension plate and the top of the second bottom plate; and an extending side plate is inserted into the top of each first side plate in a sliding manner. In the use process, according to the actual construction condition, the supporting mechanism is additionally arranged, so that effective bottom supporting in the pouring process is formed, and then according to the constructed to-be-poured steel bar structure, the extending vertical plates and the extending pedals are additionally arranged; the right-angle frame,