The invention relates to a mobile phone which comprises an upper cover and a lower cover. A rotating device and a sliding device respectively used for causing the upper cover and the lower cover to rotate and slide relatively are arranged on the upper cover and the lower cover; and a mobile phone keyboard made of electronic papers is arranged on the upper surface of the lower cover and is respectively and correspondingly displayed in the relative rotating and the relative sliding positions of the upper cover and the lower cover. By adopting the structure, the upper cover can rotate around thelower cover and can relatively slide with the lower cover, so that the use function of the mobile phone is enhanced.