A sewage treatment plant on the secondary treatment process was transformated with the fiber micro-filter wheel.After the transformation,the sewage treatment plant effluent quality is up to the Dischanrge standard of Pollutants for Municipal Wastewater Treatment Plant(GB18918-2002) in an A standard. Introduced the sewage treatment plant before and after the transformation, design parameters and operating conditions, can for some upgrading of the sewage treatment plant to provide information.