Steering tubular column collapse anti-falling mechanism and steering system

The utility model discloses a steering tubular column collapse anti-falling mechanism and a steering system. The collapse anti-falling mechanism comprises a regulating support and a fixing support for being fixed on an instrument crossbeam, and also comprises a connection plate; one end of the connection plate is fixedly connected with the fixing support while the other end is provided with a slender hole; the connection plate is connected with the regulating support by penetrating a screw into the slender hole; the steering system comprises a rotary shaft tubular column which is fixed on the regulating support. When vehicle collision occurs, the steering system can be collapsed along a preset rail and can prevent a steering wheel from falling and backwards moving.