Semi-joint overweight ultra-large type high-rigidity split working platform

The invention discloses a semi-joint overweight ultra-large type high-rigidity split working platform. The split working platform comprises a circular working platform of an inner ring and two semi-annular working platforms of an outer ring; the circular working platform and the two semi-annular working platforms are positioned by straight-edge stop openings, the circular working platform, wedge blocks and the two semi-annular working platforms are locked by the locking screws of the wedge blocks, and the oblique-edge stop openings of an upper ring and a lower ring are fastened by a connection screw of the working platform; and the two semi-annular working platforms of the outer ring are also matched by stop openings and are connected and fastened by the connection screw of the working platform and a connection pin bolt of the working platform. The invention has the advantages that the requirements on casting, hoisting and transportation can be well met, a condition that the rigidity of the connection form of