The invention discloses a multifunctional combined gear. The multifunctional combined gear comprises a first body, a groove, a second body, first clamping teeth, second clamping teeth, a connecting shaft and a reinforcing rib. The groove is formed in the front side of the first body. The center of the groove is located on the connecting shaft. Convex teeth are arranged on the connecting shaft. A connecting groove is formed in the inner wall of the second body. The second body is connected with the connecting shaft. The second clamping teeth are arranged on the second body. The first clamping teeth are arranged on the first body. The reinforcing rib is arranged in the groove. In this way, the multifunctional combined gear can be used independently, multiple combined gears can also be combined to be used in cooperation, various functions are achieved, and using is convenient.