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The adsorption essence of macroporous adsorption resin is a kind of surface adsorption phenomenon caused by the object being highly dispersed or the surface molecules being subjected to unequal forces. This adsorption performance is the result of van der Waalsattraction or hydrogen bond formation. At the same time, the porous structure of the macroporous adsorption resin makes it capable of screening substances with different molecular sizes. According to the above adsorption and screening principle, the organic compounds can be eluted on the macroporous adsorptionresin with certain solvent according to the different adsorption capacity and molecular weight, so as to achieve the different purposes of separation, purification, impurity removal and concentration.