The invention discloses a straddle type single rail traffic rail flexible turnout beam, which comprises a flexible beam section and a flexibility driving assembly, wherein the flexible beam section is used for forming the flexible turnout beam, the flexibility driving assembly is used for driving the flexible turnout beam to generate the flexibility deformation, and the flexible beam section comprises a flexible beam main body and a walking supporter. The flexible turnout beam structure formed by the flexible beam section with forced flexible deformation is adopted, when the rail conversion joint is needed, the flexibility deformation is generated through external force driving, the stabilizing surface and the guide surface of the flexible beam section are respectively in smooth transition, broken lines are eliminated, the passing of light rail trains is favorably realized, in addition, the structure is greatly simplified through being compared with that of the existing turnout structure, the manufacture cost is reduced, the manufacture work period is shortened, the service life is longer, the use and maintenance cost is saved, the comfort and the safety of the light rail running can be ensured, the vehicle running noise is reduced, and better environment protection performance is realized.