The invention relates to a refining method of dibenzyl dicarboxylic acid. The refining method comprises the steps of stirring and heating after adding a certain amount of pure water in a dibenzyl dicarboxylic acid crude product, then adding active carbon, preserving heat for a period of time, and then performing suction and filtration while the mixture is hot; cooling filtrate slowly at a certain revolving speed, crystalizing and preserving heat; performing suction and filtration; drying a filter cake to obtain a dibenzyl dicarboxylic acid pure product. The refining method has the obvious advantages that the dibenzyl dicarboxylic acid content in the obtained pure product is obviously improved and reaches the analytically pure requirement; all raw materials are recrystallized into water and active carbon, so that the refining method is green and pollution-free; the filtrate can be repeatedly utilized within a certain number of times, the wastewater quantity is less, the refining method is relatively environment friendly, and the processing method of the used active carbon is relatively simple.