Scrubber water filter skid adopts circulated self-scrubbing method to replace the conventional mechanical mixing process for backwashing. The filter materials are scrubbed through high-speed circulation during backwashing process, enabling the backwashing force can reach all the filter materials in every corner. Compared to conventional mechanical mixing method for filter material backwashing, this filter system features small backwash intensity and improved reusing effect of filter material, effectively preventing the filter material from being hardened.