Rail transit obstacle pre-warning device

The invention discloses a rail transit obstacle pre-warning device. The rail transit obstacle pre-warning device comprises a basic rail vehicle body; an obstacle detection device is arranged at the front end of the basic rail vehicle body, and an obstacle pre-warning device is arranged in the basic rail vehicle body; the obstacle detection device comprises a fixed steel plate, a T-shaped groove, aT-shaped sliding seat, a driving motor I, a rotating shaft I, a micro driving wheel, a driving toothed groove and a rotatable detection device; the rotatable detection device comprises a motor connecting plate, a rotating shaft II, a driving motor II, a tightening seat, ultrasonic detection equipment and an angle sensor; the obstacle pre-warning device comprises a main control board, an information display screen, an alarming indicating lamp and an alarm; the main control board comprises an information collection module, an information processing module, a computing chip and a main control module; obstacle monitoring