External decorative curtain wall for constructional engineering

The utility model discloses a constructional engineering outer decoration curtain wall which comprises a plurality of prefabricated keel modules, each prefabricated keel module comprises two stand columns and a plurality of cross beams arranged between the two stand columns, the stand columns are connected with cantilever beams used for being connected with a building, and hanging piece bases are arranged at the two ends of each cross beam. An upper hook and a lower hook are arranged on the hanging piece bases, a curtain wall plate is installed between the upper hanging piece base and the lower hanging piece base, an upper sectional material is arranged at the top of the curtain wall plate, a lower sectional material is arranged at the bottom of the curtain wall plate, a first installation groove used for being connected with the lower hook in a clamped mode is formed in the upper sectional material, and a second installation groove used for being connected with the lower hook in a clamped mode is formed in t