A rail transit turnout system, charactered by comprising: a base rail beam fixedly supported by a plurality of base pier columns arranged at intervals; a turnout beam having a first end and a second end opposite to each other, wherein the first end of the turnout beam is provided on a first transition pier column and is rotatably connected to the first transition pier column through a center pin, the center pin is arranged vertically, and the second end of the turnout beam is provided on a second transition pier column and is capable of traveling on the second transition pier column; and branch rail beams (8, 9, 10), wherein there are at least two branch rail beams, the branch rail beams (8, 9, 10) are fixedly supported by a plurality of branch pier columns arranged at intervals, and each of the branch rail beams (8, 9, 10) has a first end and a second end opposite to each other, the turnout beam is arranged between the base rail beam and the branch rail beams (8, 9, 10), the first end of the turnout beam docks with an end of the base rail beam facing the turnout beam, the second end of the turnout beam operatively selects to dock with a first end of one branch rail beam among the branch rail beams (8, 9, 10), and the second end of each branch rail beam (8, 9, 10) extends in a direction away from the turnout beam, characterised in that the first transition pier column is provided with two compensation assemblies, the two compensation assemblies are oppositely disposed on two sides of the turnout beam, and each compensation assembly comprises at least one compensation device, the compensation device has an output part, and the output part of the compensation device is operatively inserted into a gap between the first end of the turnout beam and the end of the base rail beam facing the turnout beam. a base rail beam fixedly supported by a plurality of base pier columns arranged at intervals; a turnout beam having a first end and a second end opposite to each other, wherein the first end of the turnout beam is provided on a first transition pier column and is rotatably connected to the first transition pier column through a center pin, the center pin is arranged vertically, and the second end of the turnout beam is provided on a second transition pier column and is capable of traveling on the second transition pier column; and branch rail beams (8, 9, 10), wherein there are at least two branch rail beams, the branch rail beams (8, 9, 10) are fixedly supported by a plurality of branch pier columns arranged at intervals, and each of the branch rail beams (8, 9, 10) has a first end and a second end opposite to each other, the turnout beam is arranged between the base rail beam and the branch rail beams (8, 9, 10), the first end of the turnout beam docks with an end of the base rail beam facing the turnout beam, the second end of the turnout beam operatively selects to dock with a first end of one branch rail beam among the branch rail beams (8, 9, 10), and the second end of each branch rail beam (8, 9, 10) extends in a direction away from the turnout beam, characterised in that the first transition pier column is provided with two compensation assemblies, the two compensation assemblies are oppositely disposed on two sides of the turnout beam, and each compensation assembly comprises at least one compensation device, the compensation device has an output part, and the output part of the compensation device is operatively inserted into a gap between the first end of the turnout beam and the end of the base rail beam facing the turnout beam.