A 3D pen capable of feeding out drawing materials of different colors simultaneously is provided having a shell, a control mechanism, several transmission mechanisms, several feeding mechanisms, and a nozzle; the shell and the control mechanism are connected with each other; the control mechanism comprises a micro-processor unit (MCU); the MCU is electrically connected with the transmission mechanisms; the transmission mechanisms are connected with the feeding mechanisms; the feeding mechanisms are connected with the nozzle. The nozzle has several feeding channels extending along a left end and a right end of the nozzle.