The invention belongs to the technical field of welding equipment, relates to a welding torch compounding plasma arcs with MIG arcs, and discloses a plasma arc and MIG arc distance adjustable intelligent composite welding torch. The composite welding torch comprises a plasma generator, a pulse MIG welding gun, a welding gun support, a welding gun bearer, a protective gas hood, a tooth bar, a tooth bar supporting frame, a connection board, a stepping motor, a control system and a current signal gatherer, wherein the welding gun support is provided with a clamp, the plasma generator is fixed on the welding gun support through the clamp, the tooth bar supporting frame is fixed on the welding gun support, the pulse MIG welding gun is connected with the tooth bar through the connecting board, the stepping motor is provided with a gear driving the tooth bar, the plasma generator and the lower end of the MIG welding gun pass through the welding gun bearer, the welding gun bearer and the welding gun support are fixed through a support rib plate, the protective gas hood is connected with the lower portion of the welding gun bearer, and the protective gas hood is provided with a protective gas interface, the current signal gatherer is connected with the control system, and the control system is connected with the stepping motor. The composite welding torch provided by the invention can realize stable, high-efficiency and high-quality composite welding.