Integrated water purifier collection of flocculation, sedimentation, drainage, backwash, collection of water filtration process in essence, such as automatic operation without personnel operation can achieve monomer series of water purification device, is an important unit to realize the automation management of waterworks, combined with JY type automatic dosing device and disinfection equipment, can be a water purification station (factory) with full functions. The FJ type integrated water purifier of domestic drinking water grade has pretreatment part (coarse and fine particle separation device) and controllable reverse system, and the integrated water purifier of internal special coating of drinking water grade has no small tube design, which can run steadily for a long time and meet the national standard GB 5749-2006 standard of domestic drinking water.