The invention relates to a medicine supplying device of medicine maintenance therapy equipment for drug addicts under control to give up drug habits. A first driving motor of a medicine drinking cup providing assembly can drive cup separating wheels to rotate through a first transmission mechanism; the cup separating wheels are used for supporting a medicine drinking cup pile to be provided; during rotating, the cup separating wheels are separated from a medicine drinking cup at the bottommost layer and are used for bearing the medicine drinking cup at an upper layer, so that the medicine drinking cup at the bottommost layer is driven to fall from a cup providing hole; a second driving motor of a transmission assembly is used for driving a manipulator to move through a second transmission mechanism; after the medicine drinking cup falling down from the medicine providing hole is taken by the manipulator at a cup receiving position, the manipulator can move to a medicine drinking position and transmit the medicine drinking cup to the medicine drinking position; and a liquid medicine peristalsis pump can inject liquid medicines stored in a liquid medicine storage container to the medicine drinking cup transmitted to the medicine drinking position to allow the drug addicts under control to give up drug habits to drink. Through the adoption of the medicine supplying device disclosed by the invention, the medicine maintenance therapy equipment for drug addicts under control to give up drug habits can conveniently, quickly and automatically feed medicines for the drug addicts under control to give up drug habits.