Abstract: The study of the working theory of drawbead was carried out in this paper.The Finite Element Analysis (FEA) model based on ANSYS was established for calculating the constraint resistance of drawbead.Then the effect of the geometrical parameters of two classical types of draw-beads with rectangular and semi-circular shape on drawing resistance was studied.The results revealed that among the parameters of the two types of drawbeads the height of drawbead and the radius of the rounded corner of the concave side effected drawing resistance in the same manner, which means the resistance of draw-bead was inversely proportional to the radius of the rounded corner of the concave side while the resistance was directly proportional to the height of drawbead.However, the radius of the raised side affected drawing resistance in a different way: the drawing resistance of rectangular drawbead was inversely proportional to the radius of the raised side; the drawing resistance of the semi-circular drawbead increased at first when the radius of the raise side increased, then progressive decreased.