The present disclosure relates to a solid electrolyte film and an all-solid-state battery including the same, and more particularly, the solid electrolyte film is fabricated by a dry process of physically mixing sulfide-based and/or halide-based solid electrolyte particles with a binder, wherein the binder is fiberized in the dry process and forms fiberized binders in an intertwined state, so that a small amount of binder is sufficient to provide improved ionic conductivity and strength.