Abstract: For China’s welding vocational training equipment backward, research and development of multi-functional stir friction welding equipment for teaching and research. Through experimental research found that, under the premise of ensuring constant axial pressure (0.5 kN), in the case of a small n/v value (n/v = 6, n/v = 4), the weld core area, the shoulder zone and heat-affected zone at the junction of the three easy to appear hole-type defects, when the n/v increased to 8 and above, no visible defects inside the weld, the reason is mainly due to the n/v value is small resulting in heat Input is too low resulting in poor mobility of thermoplastic aluminum alloy in the junction area; also found that compared to the constant displacement control method, the use of constant pressure control method of welding the weld surface is smooth and flat, the amount of flying edge and the absence of surface defects, research and development of teaching and research equipment to meet the practical training of vocational education in welding, and successfully applied to teaching and research work.