The utility model discloses a fish eye lens for showing a spherical screen film. The fish eye lens for showing a spherical screen film comprises a lens front group and a lens rear group. The utility model has the structure that a lens and a cemented lens in the lens front group are in the shape of a negative meniscus, the convex surface is forward, and the concave surface is backward, wherein the concave surface of a lens on the front end is semispherical; a definite distance exists between two positive component lenses in the lens rear group. Therefore, the fish eye lens can show film pictures on a spherical screen, which increases a viewing angle 2 omega=160 DEG of a film showing lens and enhances the visual sense perception for film pictures.