Cantilever formwork framework for construction of double-chamber hollow thin-wall high pier and construction method of cantilever formwork framework

The invention discloses a cantilever formwork framework for construction of a double-chamber hollow thin-wall high pier and a construction method of the cantilever formwork framework, and the cantilever formwork framework comprises a triangular supporting frame which is detachably and fixedly connected and assembled to the high pier; the hoisting platform is fixedly connected and assembled to the bottom end of the triangular supporting frame; the construction platform is fixedly connected and assembled to the top end of the triangular supporting frame; the main back ridge frame comprises a back ridge sliding transverse frame, a back ridge vertical frame and an inclined supporting rod; the back ridge sliding cross frame is slidably assembled on the top end surface of the construction platform in a positioning manner; the bottom end of the back ridge vertical frame and the end, close to the high pier, of the back ridge sliding transverse frame are assembled in a hinged mode. The inclined supporting rod is a fix