Full -automatic multimedium filtering device

The utility model discloses a full -automatic multimedium filtering device, include: full automatic filtration control valve is established to barrel, its top, and back flush water inlet, delivery port, the back flush delivery port of holding concurrently of intaking is established to this control valve, and automatic filtration control valve bond barrel one side is established and is synthesized inlet outlet entirely, establish the center tube as outlet pipe and backwashing gas inlet tube in the barrel, this center tube upper end is equipped with one section sleeve pipe and connects upper water distributor as inlet tube, inlet tube rear end, and the opening is connected with the comprehensive inlet outlet of full automatic filtration control valve on the center tube, and lower water distributor is connected to the center tube lower extreme, from last to establishing the active carbon filtration bed of material and quartz sand filter material layer down in proper order in the barrel, the feed inlet is establi