Conversion joint of concrete combination column and construction method

The invention discloses a transfer joint of a concrete combination column and a construction method. The transfer joint is a connecting joint of an upper-layer steel pipe concrete column part and a lower-layer steel reinforced concrete combination column and reinforced concrete beam part with a certain gradient and a frame. And an upper-layer steel pipe in the upper-layer steel pipe concrete part penetrates through the core area of the conversion joint and partially extends into the upper area of the lower-layer steel reinforced concrete combination column with the certain gradient and the frame. The connecting structure can be applied to the connecting position of an upper structure and a lower structure, namely, the connecting structure is suitable for the built-in end of a building structure, large rigidity and strength are provided in engineering, the built-in requirement is met, the structure is simple, construction is easy, the construction time can be effectively shortened, and the construction efficie