The invention discloses a multifunctional automatic one-way machine tool. The multifunctional automatic one-way machine tool comprises a rack, at least one cutter driving unit, at least one cutter carrying and conveying unit and at least one automatic feeding unit, wherein each cutter driving unit comprises a tool chuck, a transmission shaft, a rotation drive mechanism and a feed drive mechanism. The feed drive mechanism comprises a feed power source, a retractable element and a connecting piece with one end which is fixed at the tail end of the retractable element and the other end which is connected to the transmission shaft through a bearing. The rotation drive mechanism comprises a rotation power source, a transmission long gear to which the rotation power source supplies power, and a sliding gear which is fixedly connected to the transmission shaft and is engaged with the transmission long gear. The sliding gear and the transmission shaft are coaxial, the axis of the transmission long gear is in parallel with the axis of the transmission shaft, and the sliding gear can slide from one end to the other end of the transmission long gear such that the tool chuck can move back and forth between an initial working position and an end working position under the effect of the feed power source.