本文提出用分裂法把高阶近似方程分解为n-1个(n为高阶方程的阶数)二阶方程,然后用有限差分法交替地解这些二阶方程就可以实现高阶方程的偏移。本方法突破了现有差分法对倾角的局限性,因此提高了偏移的精度。 In this paper, we propose to split the high-order approximation equation into n-1 second order equations (n ​​is the order of the higher order equations) by the splitting method. Then by using the finite difference method to solve these second order equations alternately, shift. The method breaks through the limitations of the existing difference method on the dip angle, thereby improving the accuracy of the offset.