The invention discloses a special machine tool used for milling and drilling carbon fiber composites. The special machine tool comprises a machine tool body, a single-power-source three-axis feeding mechanism, a vacuum suction cup special jig and a negative pressure dust collection device. A gear turning transmission mechanism is arranged in the special machine tool, the linear feeding in the x direction, the y direction and the z direction can be achieved through the drive of only one drive motor, less motor is used, a feeding system is simplified, and feeding is stable and reliable. A workpiece is clamped by the special machine tool through the vacuum suction cup special jig, positioning is easy, and operation is convenient. The negative pressure dust collection device is arranged on a machine tool main shaft, and therefore dust generated in the machining process can be sucked and recycled in time, pollution to the working environment is avoided, and the health of working staff and the good running of machine devices are ensured. The special machine tool is simple in structure, convenient to use and suitable for milling and drilling carbon fiber sheets.