HWUF series hollow fiber ultrafiltration membrane component takes inner pressure type filtration. This structure allows easy removing of impurities held by ultrafiltration membrane via back flushing or chemical cleaning. It can also ensure no contact between pollutants and outer surface of ultrafiltration membrane and hence avoid sediment and accumulation of pollutants between membranes. Plexiglass or PVC is used for HWUF components casing and at ends, epoxy resin is placed for sealing. The running method is full flow and cross flow filtration.