Improved steel pipe constraint type precast concrete column connecting structure and construction method

The invention discloses an improved steel pipe constraint type prefabricated concrete column connecting structure and a construction method, the improved steel pipe constraint type prefabricated concrete column connecting structure comprises a first prefabricated column, the connecting end of the first prefabricated column is fixedly connected with a socket pipe, the side wall of the first prefabricated column is provided with a plurality of grout outlet holes, and the grout outlet holes communicate with the socket pipe; the connecting end of the second prefabricated column is fixedly connected with an inserting pipe, and the inserting pipe is connected with the socket pipe in an inserting mode; a grouting hole is formed in the side wall of the second prefabricated column and communicates with the inserting pipe. The positioning assembly comprises a positioning cylinder, the two ends of the positioning cylinder abut against the first prefabricated column and the second prefabricated column correspondingly, an