Fiber ball filter is a relatively new type of precision water quality treatment equipment among pressure filters. In the past, double filter media filters, walnut shell filters, sand filters, etc. have been used in the reinjection treatment of oily sewage. The fiber ball filter can meet the standards of oily sewage reinjection. It is made of a special fiber filament synthesized with a new chemical formula. The main feature is that it has been essentially improved, from the lipophilic type of fiber filter material to the hydrophilic type. The filter layer in the high-efficiency fiber ball filter uses polyester fiber balls with a height of about 1.2m, and the raw water enters and flows out from top to bottom.