The utility model discloses a coal cutter with an overall ply rocker arm. The coal cutter comprises a machine body, an overall ply rocker arm and a transition frame, wherein the machine body is connected with the overall ply rocker arm through the transition frame; the upper part of one side of the transition frame is connected with an connection lug of the overall ply rocker arm through a first connection mechanism; the lower part of one side of the transition frame is connected with an oil cylinder twisting leg of the overall ply rocker arm through a second connection mechanism. By adopting the coal cutter with the overall ply rocker arm, provided by the utility model, the maximal mining height of the coal cutter is increased on the basis of not changing an existing overall ply rocker arm structure, and the special requirements of a mine owner are met.