Writing case capable of being converted into various forms

The utility model discloses a writing case capable of changing into various forms, which comprises a connecting plate I, a flexible ligament, a connecting plate II, an S-pole magnetic sheet I, an N-pole magnetic sheet I, a long cylinder structure and a short cylinder structure, the flexible ligament is arranged on the connecting plate I, the connecting plate II is arranged on the flexible ligament, the S-pole magnetic sheet I is arranged on the connecting plate I, and the N-pole magnetic sheet I is arranged on the short cylinder structure. The first N-pole magnetic sheet is arranged on the second connecting plate, the long cylinder structure is arranged on the first connecting plate, the short cylinder structure is arranged on the second connecting plate, the long cylinder structure comprises a long box body, a three-fold long box plate, a second S-pole magnetic sheet, a second N-pole magnetic sheet, a decorative limiting plate and a small mirror, the long box body is arranged on the first connecting plate, a