The invention provides a straddle type monorail train and an anti-dive torsion bar type single-axle bogie thereof. The anti-dive torsion bar type single-axle bogie comprises a framework body (1), a draw bar (3) for being connected with a train body is arranged at one end of the framework body (1), and anti-dive devices are arranged on the two sides of the framework body (1). Each anti-dive devicecomprises a torsion bar parallel to the front-back direction of the straddle type monorail train, torsion arms (6) located at the two ends of the torsion bar and connection bars (5) corresponding to the torsion arms (6), wherein the torsion bar is rotationally connected with the framework body (1) and rotates around the axis of the torsion bar relative to the framework body (1); the horizontally-arranged two torsion arms (6) are located on the same side of the torsion bar and fixedly connected with the torsion bar; and the connection bars (5) are arranged vertically, the lower ends of the connection bars (5) are hinged to the torsion arms (6), and the upper ends of the connection bars (5) are connected with the train body. The anti-dive torsion bar type single-axle bogie provided by the invention can effectively restrain pitching vibration of the train body, so that the straddle type monorail train has high smoothness.