In order to solve the river micro-pollution at Zhangwuzha in the east of Longhe River, Anci District, Langfang City, a combined process of zeolite biological filter and sponge iron/limestone filter was constructed. The removal of COD and TP by the combined process and the optimal operation parameters were investigated. The results show that the sponge iron/limestone filter is homogeneously filled, and the volume ratio of sponge iron/limestone is 3 ∶ 7. With an influent COD concentration of 72±11 mg/L, an influent TP concentraiton of 1.52 ± 0.53 mg/L, and HRT of 1.5 h, the average removal rates of COD and TP are 76.51% and 85.37%, respectively, by the combined process. When the combined process was under the normal water quality conditions (COD=56±10 mg/L, TP=0.65±14 mg/L) and the HRT was 0.8 h, the average removal rates of COD and TP are 89.33% and 74.27%, and the effluent COD and TP concentrations meet the class IV water standard of surface water.