Connecting structure between steel structural parts

The utility model relates to the technical field of steel connection, and discloses a connecting structure between steel structural parts, which comprises a connecting main column body, a base plate body fixedly connected with the bottom of the connecting main column body, and an inner column body arranged on the inner side of a barrel body of the connecting main column body, and a bottom plug opening communicating with the top plug opening is formed in the annular surface of the connecting main column body, a steel plate body is installed on the inner side of the bottom plug opening in a penetrating and inserting mode, and a limiting steel plate is fixed to the end, extending into the inner side of the connecting main column body, of the steel plate body. The connecting main column body is designed to be of the cylindrical structure, the top plug opening and the bottom plug opening which are combined with the steel plate body are annularly distributed, and therefore the number of installation points of the s