The invention discloses a radial telescopic net rack-membrane combined structure. The structure consists of a lower radial telescopic net rack structure and an upper membrane structure, wherein the net rack structure consists of two or more circumferential chain-shaped shear-type mechanisms and two or more radial chain-shaped shear-type mechanisms; the radial telescopic net rack structure is divided into continuous membrane distribution areas on a projection plane, and each membrane distribution area comprises an inner quadrangle, a first middle quadrangle, a second middle quadrangle and an outer quadrangle; the membrane structure consists of a first membrane unit, a second membrane unit and a third membrane unit, and each of the first membrane unit, the second membrane unit and the third membrane unit consists of vertical rods and membrane materials covering the vertical rods. The circumferential chain-shaped shear-type mechanisms and the radial chain-shaped shear-type mechanisms telescope synchronously, the membrane structure provided with the vertical rods is adopted at the upper part, so that the net rack-membrane combined structure telescopes freely and has large telescoping rate; the structure has large vertical stiffness due to that fact that shear-type hinge units are folded on vertical surfaces, and besides, the structure is reasonable in structure, simple to design and construct and particularly suitable for buildings with small and medium span.