The utility model provides a be used for keeping uncontaminated device of indoor aquatic plant quality of water, the device include suction pipe device, suction pump device and drain pipe, during thewater inlet of suction pipe device diped the water culturing solution in the vase, the water inlet at the suction pump device was connected to the delivery port of suction pipe device, the water inletof the delivery port run -on water pipe of suction pump device, and the delivery port of drain pipe dipes in the vase or places in the cask. When the teaching draw case is in use, the water pump water absorbing principle is inhaled in the utilization, in absorbing the suction pump device through culture solution and the debris of suction pipe device in with the vase, preserve in the storage areathrough the filterable debris of suction pump device, the debris of retention in the storage area can be through manual cleaning to the cask in, culture solution after filtering the suction pump device is in the drain pipe discharges vase or cask, so as to effectively clears up the debris in the indoor aquatic plant culture solution, ensure indoor aquatic plant's growing environment.