The invention discloses a transition system for butt joint of a straddle-type monorail section turnout beam and a station. The system comprises a bearing platform foundation (1); the bearing platformfoundation (1) is provided with a station bridge pier (2) and a turnout beam bridge pier (10); the top of the station bridge pier (2) is provided with a station hall layer cover beam (3), a pluralityof station hall columns (4) are arranged above the station hall layer cover beam (3) at intervals for supporting a station platform layer cover beam (7) arranged on the station hall columns (4), and station rail beams (8) are longitudinally arranged above the station platform layer cover beam (7); the top of the turnout beam bridge pier (10) is provided with a turnout beam (6), the portion, corresponding to the station rail beams (8), of the turnout beam (6) is longitudinally provided with a mechanical turnout (9), the ends of the station rail beams (8) and the mechanical turnout (9) are rightopposite to each other, and the elevations of the top surfaces of the station rail beams (8) and the mechanical turnout (9) are the same, so that the butt joint of the straddle-type monorail sectionturnout beam and the station is achieved. The bearing requirement for the station pier due to the arrangement of brackets is avoided; the influence of the arrangement of the section transition rail beam on the use function of the turnout is also avoided.