The invention discloses a multifunctional combined drawing box, comprising a front box and a back box which are arrayed and fixedly connected front and back; a left front box and a left back box are arranged at the left side of the front box and the back box, a right front box and a right back box are arranged at the right side of the front box and the back box, the left side of a joint part between the front box and the back box is hinged and matched with a right back corner of the left front box through a vertical left hinge shaft, a left back corner of the left front box is hinged and matched with the left front corner of the left back box through a vertical secondary left hinge shaft, the right side of the joint part between the front box and the back box is hinged and matched with a left back corner of the right front box through a vertical right hinge shaft, and a right back corner of the back box and the left back corner of the right back box are hinged and matched through a vertical secondary right hinge shaft. The structure is reasonable, a shape per se can be freely combined and adjusted according to the shape of an office space, the adaptability is high, the drawing box can be used for storing various documents or drawings in a sorting manner without a size limitation, and the documents or drawings can be taken out simply and conveniently without mistakes.