Keyway-connected full-fabricated building composite interior wall panel and application thereof

The invention discloses a key groove connected full-fabricated building composite interior wall panel which is formed by compounding side rib concrete on two sides, a frame, an inner filling heat preservation layer and a facing layer, and an ultra-light foam concrete filling material is adopted as a heat preservation material. The composite interior wall panel is a structure-heat preservation and insulation-decoration integrated wall panel prefabricated in a factory, and has the characteristics of light self weight, high component quality, excellent heat preservation and insulation performance and the like; when the composite wallboard is manufactured, a formwork is firstly erected to pour a bottom layer concrete frame and side ribs, the bottom layer concrete frame and the side ribs are filled with a heat preservation layer, then top layer concrete is poured, and finally a decoration surface layer is manufactured and installed on the surface of the wallboard. The composite inner wall plate can be positioned o