The filter belt is able to achieve wash its' filter belt over and over again, surplus rate, drying the filter belt and reuse the filter belt. It has the high efficiency in screening impurities, strong production capacity, strong cleaning effect and etc., It can be operated by people easily for its agile features. This kind of conveyor belt are extensively used in continuous too much dehydration in chemical industries(especially fertilizers); aluminum hydroxide, coal slime, great minerals in metals, and other environmental protection objects.