Prefabricated constructional column and prefabricated constructional column reverse construction partition wall construction method

The invention relates to the technical field of building construction, and particularly discloses a prefabricated constructional column and a prefabricated constructional column reverse construction partition wall construction method. The prefabricated constructional column comprises a cast-in-place pile and a prefabricated pipe, the lower part of the prefabricated pipe extends into the cast-in-place pile, a positioning steel bar frame is vertically arranged in the cast-in-place pile, a connecting rod is fixedly arranged on the positioning steel bar frame, and the end, away from the positioning steel bar frame, of the connecting rod is fixedly connected to the inner wall of the cast-in-place pile; and the upper part of the positioning steel bar frame extends into the prefabricated pipe, and the outer wall of the positioning steel bar frame abuts against the inner wall of the prefabricated pipe. The vertical stability and the deviation capacity of the prefabricated pipe inserted into the cast-in-place pile are