On-line inspection device for rail transit

The utility model discloses a track traffic on-line inspection device which comprises a track detection beam and an inspection camera installed below the track detection beam, the lower surface of the track detection beam is connected with an installation plate in an abutting mode, and limiting assemblies are installed between the two ends of the installation plate and the side wall of the track detection beam. The lower surface of the mounting plate is fixedly connected with a mounting box, and the inspection camera is fixedly mounted at the bottom of the inner wall of the mounting box. According to the utility model, through the arrangement of the limiting assembly, the mounting plate is firstly pushed towards one side, so that the elastic shifting plate at one end of the upper surface of the mounting plate can abut against the abutting plate which is abutted against the elastic shifting plate, then the elastic clamping block at one end of the mounting plate is taken down from the side wall of the track det