The invention relates to a folding display device. The display device comprises a flexible display screen and a supporting main body; the supporting main body comprises a plurality of first grooves and a plurality of second grooves; the positions where the multiple first grooves are located are first folding positions, and the positions where the multiple second grooves are located are second folding positions; the folding display device has a first folding state, and when the folding display device is in the first folding state, a display face is wrapped in the supporting main body; or the folding display device has a second folding state, and when the folding display device is in the second folding state, the display face is exposed out of the supporting main body; or the folding display device has a third folding state, and when the folding display device is in the third folding state, a part of the display face is wrapped in the supporting main body, and the other part of the display face is exposed out of the supporting main body. According to the scheme of the folding display device, the folding modes of the flexible display device are more diversified, the requirement for various kinds of applications of the folding display device can be met, and the flexibility of the folding display device is improved.