Compound heat-insulation board of outer wall and installation part thereof

The invention discloses a compound heat-insulation board of an outer wall, comprising foaming material and aluminum protection layer. Coating edges for coating the foaming material are downwards arranged around the aluminum protection layer; wing brims are arranged around the foaming material; the foaming material is internally provided with a conveniently installed installation component on which an installation groove is arranged; and the installation component is fixed on the protection layer. The invention also discloses an installation part of the compound heat-insulation board of the outer wall, consisting of a base board and an installation board, wherein the base board is vertically and fixedly connected with the installation board; and the installation board is inserted into the installation groove of the installation component of the compound heat-insulation board of the outer wall in installation. The invention has the characteristics of good heat-insulation property, high installation speed, long