Shaftway steel frame structure suitable for adding sightseeing elevator to existing building

The utility model provides a hoistway steel frame structure suitable for adding a sightseeing elevator to an existing building, which comprises a plurality of wall-attached steel columns vertically arranged on the outer side face of an original building structure, the wall-attached steel columns are arranged on the outer side face of the original building structure at intervals, and the wall-attached steel columns are connected with the outer side face of the original building structure through rear embedded parts. A plurality of first hoistway steel frame cross beams are arranged on the wall-attached steel columns, the other ends of the first hoistway steel frame cross beams are connected with stand columns, and second hoistway steel frame cross beams are connected between the stand columns; compared with a traditional hoistway steel frame structure, the hoistway steel frame structure is high in construction speed, low in cost and good in construction environment, and meanwhile the engineering defects of cra