Novel firm section steel

The utility model relates to the technical field of section steel, in particular to novel firm section steel. The technical scheme adopted by the utility model is as follows: the nursing bed comprisesa bed body, the section steel comprises a section steel main body structure with a square section in the left-right direction, a cylindrical center stable connecting hole penetrating through the right side of the part is formed in the center of the left end face of the profile steel body structure. A rectangular first assembly connecting groove is formed in the middle of each of the front-back direction and the up-down direction of the section steel main body structure; a triangular second assembling connecting groove is formed in the position, close to the end face of one side of the centershaft of the profile steel body structure, of the first assembling connecting groove, and the included angle of one side, close to the profile steel body structure, of the second assembling connectinggroove is an arc-shaped st