Bottom die structure for cantilever casting and construction method thereof

The invention belongs to the field of cantilever casting, and particularly relates to a bottom die structure for cantilever casting and a construction method thereof.The bottom die structure for cantilever casting comprises a bottom basket device and a bottom die device; the bottom basket device comprises a cross beam assembly, a longitudinal beam assembly and a telescopic assembly I, one end of the cross beam assembly is hinged to one end of the longitudinal beam assembly, and the telescopic assembly I is arranged between the cross beam assembly and the longitudinal beam assembly and used for driving the longitudinal beam assembly to rotate around the hinged position; the bottom die device comprises a bottom die and a telescopic assembly II, the two ends of the bottom die are arranged on the longitudinal beam assembly, and the telescopic assembly II is arranged between the bottom die and the longitudinal beam assembly and used for driving the bottom die to deform into a curved surface; according to the botto