A method for manufacturing an input assembly, an input assembly and a terminal are provided. The input assembly includes a decoration enclosure, a touch panel, a fingerprint chip package structure and a display screen component, and the touch panel defines a blind hole in a lower surface thereof. The method for manufacturing the input assembly includes: mounting the fingerprint chip package structure in the decoration enclosure; mounting the decoration enclosure carried with the fingerprint chip package structure in the blind hole; mounting the display screen component to the lower surface of the touch panel, in which a first orthographic projection of the display screen component in the lower surface of the touch panel overlaps a second orthographic projection of the decoration enclosure in the lower surface of the touch panel.