The influence of several kinds of typical variable blankholder force on drawing formability of Aluminum (Al) alloy tubeshaped parts was studied by using the method of finite element numerical simulation, and the strain path in some different positions of tubeshaped parts during the process of stamping was analyzed. The principle of Al alloy tubeshaped parts was revealed during the forming. The distinction of the Al alloy material stretch forming was studied when it was under the condition of several typical blankholder force, and by taking the largest reduction ratio of the sheet before it was ruptured as the main judgment, the maximum tensile depth that was the tubeshaped parts able to achieve was studied, when it was under the action of blankholder force, which was changed by several typical law. The results show that when the blankholder force is a gradually increasing type and type, which helps to improve the formability of Al alloy tubeshaped parts.