The present invention disclosed a simply packaged pen needle and methods of use, comprising of at least one needle body and at least one packaging body used to package said needle body, where said needle body is comprised of a needle hub, a cannula, and an inner protective cap connected consecutively, said packaging body comprises of a packaging cup and the sealing paper, said packaging cup comprises of at least one chamber coupled with said needle body, said needle hub comprises of at least one axial protrusion on its outer circumference, the inner wall of said chamber comprises of at least one groove coupled with the axial protrusion, the upper edge of said chamber is a flat surface, said sealing paper connects with the flat surface. As a result, this simply packaged pen needle and methods of use will simplify the entire manufacturing and sealing processes, significantly enhance the reliability of sterile sealing, greatly reduce product cost, especially suitable for mass production, thus is of great economic value.