Abstract: Anticholinergic drugs have been widely used for many years in neurological research field and clinicial therapy of many dieases, such as parkinsonism stomachache and the organophosphorus agents poisoning. It is important that investigating the conformation-activity relationship (CAR), 3D-QSAR and molecular pharmacology of these compounds to aid in die design highly selective drugs and explain many phenomena understood difficultly,including the similar biological effects for various compounds and different effects for a single compound.