The attapulgite/organic composite membrane was prepared by mixing attapulgite, PVDF. DMF and distilled water. Acidification, alkali treatment and high temperature activation were used separately to modify the membrane. XRD and SEM were used to characterize the morphology and internal structure of attapulgite powder. The structural differences of composite membranes prepared by different modification methods were compared. The adsorption performance of the composite membrane for dye was investigated. The results show that the introduction of attapulgite effectively improves the adsorption performance of organic membrane for dyes and it is conducive to the separation of liquid phase. All the pre-treatment methods can effectively improve the adsorption performance of the composite membrane. Acidification and high-temperature calcination improve the adsorption performance more significantly than other pre-treatment methods, and their maximum adsorption rates are 94.68% and 94.5%, respectively. When the amount of composite membrane was 0.1 g and the concentration of rhodamine B was 10 mg/L, the adsorption rate reaches 94.07%.