The invention relates to the technical field of quality-divided water purification and supply, in particular to a combined type quality-divided water purification and supply device, the inside of which is formed by three
layers of multifunctional quality-divided water purification annular sleeve barrels and a four-layered quality-divided
water supply chamber with different functions, wherein the three
layers of multifunctional quality-divided water purification annular sleeve barrels respectively contain high-quality direct drinking water of an
internal layer, middle-quality domestic water of a middle layer and elementary
wash water of an external layer and have different functions; the inner walls of the barrels are provided with small round holes or linear wall slot lines as well as round oblique diversion tunnels of a water-proof
backflow round baffle and a vertical
water diversion baffle arranged outside the tunnels; an
ultraviolet lamp and a most advanced annular
filtration barrel component are arranged at the lower bottom part of the middle of the
barrel; the upper end and the lower end of the
barrel are respectively and fixedly installed in an upper and a lower fixed holding slot components; annular permanent magnetic and
tourmaline gaskets are installed at the upper sides of the outsides of the holding slot components; and regulating rings capable of regulating the size and the flow of pores and the water-proof
backflow baffles are respectively arranged in a water inlet passage and a water outlet passage of an upper cover shell and a lower cover shell. The invention has unit modular industrialized production, can be assembled on site according to the requirements, has ingenious design and complete functions, low cost and obvious effect, is widely used and is conveniently maintained and changed, all the water is utilized without waste, and filter mediums can be repeatedly used.