The invention relates to a vane used for playing, decorating and exhibiting, in particular to relating to a double-sided vane which makes use of signal sheets to cut up a forming paper. The vane is formed via cutting to form a rotating wing part on a signal sheet of the forming paper along a radial stripping line and folding the rotating wing part by turns to the forth and back direction in turn to fix and combine on a rotation supporting shaft. The vane not only has excellent ornamental, but also the appearance of the vane is provided with more interests, and at the same time the vane is provided with excellent rotating stability without being limited by wind direction, thereby not only having protrudent stereoscopic impression and aesthetics feeling, but also taking the gorgeous rotating form thereof to improve the effect of advertisement, publicity and exhibition. The invention forms a decoration part between the adjacent rotating wing parts, and folds each rotating wing part to form the double-sided vane. The decoration part is projected to outside to be formed, and can deduce florid plane decoration effect and cause the shape of the vane more special and gorgeous thereby more catching eyeballs and at the same time giving protrudent stereoscopic impression.