Foldable storage bag

The utility model provides a foldable storage bag which comprises an upper cover and a lower cover, an interlayer cavity for accommodating electronic equipment and an interlayer cavity opening are formed between the upper cover and the lower cover, the upper cover and the lower cover at the opening of the interlayer cavity are connected through magnet attraction, and the upper cover and the lowercover except the opening of the interlayer cavity are fixedly connected; wherein the upper cover comprises a plurality of first folding parts, the lower cover comprises a plurality of second folding parts, the first folding parts and the second folding parts can be folded synchronously, the first folding parts and the second folding parts are folded to form a supporting frame used for supporting electronic equipment, and the supporting frame is attracted and fixed through magnets; the length of the lower cover is larger than that of the upper cover, the lower cover is provided with a pen cap used for containing a pen,