Integral hoisting construction device and method for large-capacity bearing platform double-wall casing box

The invention discloses a large-capacity bearing platform double-wall casing box integral hoisting construction device and method. The large-capacity bearing platform double-wall casing box integral hoisting construction device comprises a floating crane, a flat barge, a casing box assembly and a construction platform. A plurality of sets of anchoring ropes are arranged on the periphery of the floating crane, anchor rods are arranged at the ends of the anchoring ropes, a hanging bracket used for hoisting the casing box assembly is installed on the floating crane, the flat barge is used for assembling and transporting the casing box assembly, and the construction platform is fixedly erected at a bridge pier. The construction platform is provided with an installation groove used for installing the casing box assembly. The casing box assembly comprises a casing box bottom plate and a casing box bottom plate main beam, the casing box bottom plate main beam is fixedly installed at the lowerend of the casing box bo