根据多晶体的晶体学滑移理论，提出了计算不同织构组元、不同织构程度板材完整屈服表面的方法。并在此基础上，提出了计算同一织构板在不同方向拉伸时相应的塑性应变比Ｒ（θ）值和屈服应力比σ（θ）／σ（０）的方法。描述了织构组元、织构程度、拉伸方向的不同对织构板屈服表面形状和大小的影响，以及Ｒ（θ）和σ（θ）／σ（０）的变化情况。 According to the theory of crystallographic slippage of polycrystalline, a method for calculating the complete yield surface of plates with different textured elements and different textured degrees is proposed. On this basis, the corresponding plastic strain ratio R (θ) value and yield stress ratio σ (θ) / σ (0) when the same textured plate is stretched in different directions are proposed. The influence of texture elements, the degree of texture and the direction of stretching on the shape and size of the yield surface of the slab is described. The changes of R (θ) and σ (θ) / σ (0) are also described.