Automatic obstacle crossing device for agricultural implement

The invention relates to the field of agricultural implements, in particular to an agricultural implement automatic obstacle crossing device which comprises carrying frames, a steering assembly on the front portion of a tractor is connected with the two carrying frames, lifting assemblies are arranged on the surfaces of the carrying frames, two sliding parts are symmetrically fixed to the two sides of the tractor, and the sliding parts are arc-shaped sliding ways with the rotating portions of the carrying frames as centers. A sliding column is fixedly installed on the top of the carrying frame and slides in the sliding piece. Two steering wheels are arranged on the side edge of each carrying frame, two swing arms are rotationally arranged on the surfaces of the carrying frames in a crossed mode, the bottom ends of the swing arms are rotationally connected with the steering wheels, and two connecting rods are rotationally arranged at the moving end of the lifting assembly in a crossed mode. The lifting assembl