Universal four-wheeled agricultural implement

The invention discloses a universal four-wheeled agricultural implement. The universal four-wheeled agricultural implement comprises a fixed support, a supporting rod horizontally arranged is connected to the fixed support, a connecting piece is rotationally connected to the middle of the top end of the supporting rod, a first fixed rod is welded to one side of the fixed support, a second fixed rod is rotationally connected to the other side of the supporting rod and is arranged parallel to the first fixed rod, front wheels are arranged at the two sides of the bottom of the first fixed rod, rear wheels are arranged at the two sides of the bottom of the second fixed rod, supporting frames are installed on the front wheels and the rear wheels, the ends of the supporting frames correspondingly extend to the upside of the first fixed rod and the upside of the second fixed rod, a first rotating part is arranged at one side of the top of the first fixed rod, a second rotating part is arranged at the other side of t