Abstract: Took zeolite and coal cinder as main substrates to construct micro-ecology filter to remedy landscaping water body.Screening and domesticating dominant colony to intensify remedying process,took aboriginal colony and naked substrate as contrast.Results showed that,naked substrate filter could reduce NH₄⁺-N concentration in short period through ion exchange and adsorption,nitrification exist in system and there was accumulation of NO₃^--N;dominant colony intensified system decreased NH₄⁺-N more quickly and last concentration of NH₄⁺-N was lower than 0.5 mg/L,accumulation of NO₃^--N was little,removal and circle of nitrogen was carried well in dominant colony system.Ion exchange rates and nitrification rate in dominant colony system increased evidently along hydraulic distance.Nitrogen transition colony could intensify nitrogen circle in the system,the function and activity of nitrous colony was affected little.