Lightweight modeling design structure of metal wallboard of arc-shaped curtain wall

The invention provides a lightweight modeling design structure of a metal wallboard of an arc-shaped curtain wall. The structure comprises a plurality of main keels, a plurality of arc-shaped keels, clamping pieces, an arc-shaped wallboard and a stretching mechanism, the plurality of main keels are fixedly connected to an arc-shaped wall surface, the main keels are vertically arranged, the arc-shaped keels are sequentially connected with the plurality of main keels, the arc-shaped keels are horizontally arranged, grooves are formed in the outer side faces of the arc-shaped keels, the clampingpieces are clamped in the grooves, and first bolts sequentially penetrate through the clamping pieces and the arc-shaped keels to be connected with the main keels. The upper and lower ends of the arc-shaped wallboard are clamped into the clamping pieces with the same radian, so that the arc-shaped wallboard is stressed uniformly, a stable connecting structure is formed, and the structural stability is good. Back ribs are