Axle steering heavy cross-country trailer chassis

The invention provides an axle steering heavy cross-country trailer chassis. The axle steering heavy cross-country trailer chassis comprises a frame, an electrical system and a pneumatic braking system are mounted on the frame, a rear suspension is mounted below the rear end of the frame, and a turntable is mounted below the front end of the frame; the lower portion of the rear suspension is connected with a rear wheel set, and a bogie is installed below the rotating disc. A front suspension is installed below the bogie, and a front wheel set is installed below the front suspension. The front end of the bogie is connected with a traction frame and a plurality of safety chains, and the traction frame rotates in the vertical direction of the bogie; the middle of the safety chain is connected with the traction frame, and a hook is arranged at the front end of the safety chain. The hook at the front end of the safety chain is connected with the tractor, so that when the trailer and the tractor are unhooked accide