The invention discloses a beveling-free feed type coal cutter drum. The beveling-free feed type coal cutter drum comprises a conical drum hub mounted on a coal cutter; an end disc is fixed on a smalldiameter end of the conical drum hub; multiple homodromous spiral blades are formed on the surface of the conical drum hub; one ends of the spiral blades are connected with the end disc, and free endsare formed on the other ends of the spiral blades; multiple cutting teeth are formed on each spiral blade; the cutting teeth are sequentially distributed from the end disc to the free ends of the spiral blades; the sizes of the cutting teeth increase sequentially; the teeth top directions of the cutting teeth are the same as a rotating direction of the spiral blades; end disc cutting teeth are formed on the end disc; the sizes of the end disc cutting teeth are smaller than those of the cutting teeth. When in use, a beveling-free feed type coal mining process can be avoided, the coal mining efficiency is effectively enhanced, the working stability of the coal cutter drum is improved, the phenomenon of teeth disintegration can be effectively avoided, the wear degree of the cutting teeth isreduced, thereby achieving the purposes of reducing the production cost and shortening the project progress. The invention further discloses a usage method of the beveling-free feed type coal cutter drum.