The solvent extraction of medicinal herb, water flowing during plant materials drying and membrane separation processing in porous structure of membrane are all complicated mass and energy transfer process for its un-homogeneity, un-stability and coupling with the biological physics and chemistry properties. Microwave Assisted Extraction (MAE) is a kind of green extraction technology.This paper studied the effect of microwave on the mass transfer process of plant porous materials from the points of the micr...