Energy-saving building curtain wall capable of absorbing sound

The invention relates to the technical field of building structures, in particular to an energy-saving building curtain wall capable of absorbing sound, which comprises an inner wallboard, a heat preservation layer, a heat insulation layer, a sound absorption layer and an outer wallboard which are sequentially arranged, wherein sound absorption holes are formed in one side of the sound absorptionlayer, the ends, with the small sections, of the sound absorption holes face the outer wallboard, and the sound absorption holes are spirally formed in the outer wallboard. A plurality of blocking columns are slidingly connected to the inner side walls of the sound absorption holes, the sliding direction of the blocking columns is perpendicular to the side wall of the sound absorption holes, sliding grooves for allowing the blocking columns to slide are formed in the side walls of the sound absorption holes, and reset pieces are arranged in the sliding grooves. After passing through the outerwallboard, sound enters th