The invention provides a lifting platform box girder support structure for super high-rise buildings and a construction method thereof, wherein the lifting platform box girder support structure comprises a lifting platform and a box girder arranged at the bottom of the lifting platform, a support corbel is arranged at the end part of the box girder, a shear wall of a super high-rise building is provided with a support end corresponding to the support corbel, a hole is formed in a position of the shear wall corresponding to the support corbel of at least one box girder, and a temporary support frame is arranged in the hole position to underprop the support corbel. The lifting platform box girder support structure for super high-rise buildings provides a supporting point for the box girder in the hole position of the shear wall, thereby better ensuring safety of the lifting platform.