The invention discloses a multifunctional bag. The multifunctional bag comprises a bag body. A control panel is arranged on the front face of the bag body, a bicolor LED lamp is arranged on the lower portion of the left side face of the bag body and comprises an ultraviolet LED lamp tube and a red LED lamp tube, an anion release port is formed in the lower portion of the right side face of the bag body, and a white high-brightness LED lamp tube is further installed at the anion release port. The control panel and the bag body are of an integrated structure, a portable power source is clamped at the joint of the control panel and the bag body and provided with a first charging interface, a second charging interface and a third charging interface, and a storage battery is arranged in the portable power source. The multifunctional bag is ingenious in structure, has the functions of classification, theft prevention, ultraviolet light paper money checking, red light warning and anion air cleaning besides the function of a common knapsack for carrying articles, and provides great convenience for users in daily use.