The utility model belongs to the technical field of cantilever cast-in-situ continuous beam bridge #0 section bracket construction, and particularly relates to a bracket device used for cast-in-situ #0 section construction of a beam column oblique crossing system. The bracket device aims to solve the problem that when a bracket is designed, materials are wasted easily, or due to uneven structural stress, a concrete bottom board cracks. The bracket device used for cast-in-situ #0 section construction of the beam column oblique crossing system comprises a triangular bracket I, a triangular bracket II and a triangular bracket III which are connected to the two symmetrical sides of a pier body, the upper portions of the triangular bracket I, the triangular bracket II and the triangular bracket III are provided with a bottom board longitudinal beam, and a transverse cushion beam I, a transverse cushion beam II and a longitudinal beam cushion beam are connected between the bottom board longitudinal beam and the triangular bracket I, between the bottom board longitudinal beam and the triangular bracket II and between the bottom board longitudinal beam and the triangular bracket III respectively. The stress performance of the bracket is improved, the stress function of materials is fully played, the construction progress is accelerated, and the installation process is economical, rapid and efficient compared with other bracket modes.