Abstract: A foldable mobile phone protector includes a mobile phone case, an outer cover and a connecting part; wherein the mobile phone case comprises a secondary case and a main case, the outer cover comprises a secondary cover and a main cover, and the connecting part comprises an elastic band and a flexible protective layer. The outer cover and the connecting part of the foldable mobile phone protector are both connected by sewing, and the sewing process can be completed at one time, this sewing design does not require a complicated production process, and provided in high production efficiency and low production cost. When the elastic band is in a stretched state, the flexible protective layer extends out of the main cover through the opening and covers the folding seam of the foldable mobile phone.