在众多的纵、横波分离方法中.τ-p变换法具有一定的优势、但是,纵、横波的能量在τ-p域往往相互重叠,不容易分开.文中在τ-p变换的基础上对波场分离方法作了改进,提出一种经坐标拉伸的τ-p变换法,称为τ-q变换.在τ-q变换域,纵、横彼的能量分别汇聚到左右分开的不同q的一些点上,因此易于实现分离.合成记录和实际资料的试验证明该方法是可行的. In many vertical and transverse wave separation methods, the τ-p transform method has some advantages, however, the energy of the longitudinal and transverse waves often overlap each other in the τ-p domain and can not be easily separated. Based on the τ-p transform, The method of wave field separation is improved, and a τ-p transformation by coordinate stretching is proposed, which is called τ-q transformation. In the τ-q transformation domain, the energies of the vertical and horizontal beams converge to different q So it is easy to realize the separation.Experimental results of synthetic records and actual data prove that this method is feasible.