中文摘要：

在Cerjan吸收边界和PML吸收边界的基础上提出了基于Cerjan衰减函数的PML吸收边界。通过两种吸收边界条件下地震波场模拟计算比较表明，后者具有吸收更干净且能够吸收各种角度的边界反射等优点，并且保留了前者操作简单的特点，计算时间少，适用于二维情形下的地震波数值模拟。

英文摘要：

This paper proposes PML absorbing boundary based on Cerjan attenuation function based on the study of Cerjan absorbing boundary and PMI, absorbing boundary. Wave field modeling calculations by using two absorl）ing boundary conditions show that PML absorbing boundary based on Cerjan attenuation function can perform absorption much more clearly and absorb the boundary reflection from various angles. Besides,its operation is easy,the calculation time is short, and it is suitable to seismic wave numerical modeling in two-dimensional situation.