R0 reverse osmosis pretreatment high-flow filter element can greatly reduce the investment cost compared with standard 2.5-inch filter element in the application field of reverse osmosis water treatment equipment pre-filtration and similar high-flow filter element. The processing flow of each R0 reverse osmosis pretreatment large-flow filter element can reach 30T/h, so it can reduce the number of filter elements used and the size of the filter housing.