Railway track temporary supporting structure and construction method thereof

The invention discloses a railway track temporary supporting structure which comprises a plurality of fulcrum piles, the fulcrum piles are vertically arranged between an existing railway track and a newly-built tunnel, and the fulcrum piles are evenly arranged along the existing railway track at intervals. The longitudinal supporting beams are horizontally arranged at the upper parts of the fulcrum piles and are arranged in parallel along the direction of the existing railway track; transverse supporting beams are arranged at the intersection points of the fulcrum piles and the longitudinal supporting beams and arranged between the fulcrum piles and the longitudinal supporting beams. A plurality of transverse distribution beams are arranged between every two adjacent transverse supportingbeams; the fulcrum piles, the longitudinal supporting beams, the transverse supporting beams and the transverse distribution beams are combined to form an overhead stress structure; load of the existing railway track is trans