Full-scale derailing principle test stand with steering frame operating on rails

The invention relates to a full-scale derailing principle test stand with a steering frame operating on rails. Tractor guide rails are arranged outside railway rails and matched with wheels of a tractor, the steering frame is arranged in the tractor, and the front and the back of the steering frame are connected with the tractor through steel ropes; a drive device in front of the railway rails isconnected with the front end of the tractor through steel ropes; cylinder rods of a front transverse electric cylinder and a back transverse electric cylinder at the left side of the tractor are respectively connected with a front axle casting and a back axle casing at the left side of the steering frame through respective transverse steel ropes; and cylinder rods of a left longitudinal electric cylinder and a right longitudinal electric cylinder at the front of the tractor are respectively connected with a framework of the steering frame through respective longitudinal cylinder rods. The test stand can freely regulate and change test parameters, can be used for researching extreme working conditions of derailing of the tractor, can really reflect the actual wheel and rail interaction characteristics, has the advantages of short test period and low cost, and has important significance on safety operation of high-speed and heavy haul railways and the like.