Abstract: We propose a layer-oriented integration arithmetic for conformal perfectly matched layer (CPML).It reduces number of element and computational scale by superposing multilayer integration to monolayer integration.To retain geometrical and material information of multilayer elements we mesh CPML by multilayer elements and calculate element matrixes by monolayer integration.Numerical examples show that layer-oriented integration CPML is a reliable and high-efficient absorbing boundary condition.

Key words: conformal PML, layer-oriented integration arithmetic, absorbing boundary condition