In order to study the purification effect of biological contact oxidation process on source water, the paper took different fillers as matrix to construct four biological contact oxidation ponds and conducted field experiment.The result showed that the mean removal rates of TP of the four biological contact oxidation ponds such as combined medium (AM), elastic medium (EM), SDF AquaMats (SDFM) and BDF AquaMats (BDFM) are 59.4%, 59.4%, 44.7% and 51.9% respectively; the mean removal rates of NH+4-N are 36.5%, 33.4%, 35.0% and 36.6% respectively; the mean removal rates of TN are 21.6%, 18.8%, 22.3% and 18.0% respectively. For organic matters, the mean removal rates of CODMn are 13.9%, 13.7%, 14.5% and 13.4% respectively; the mean removal rates of TOC are 10.7%, 13.6%, 13.4% and 11.5% respectively; the mean removal rates of UVA254 are 31.1%, 34.0%, 25.3% and 26.2% respectively; the mean removal rates of UVA410 are 54.2%, 62.0%, 47.2% and 49.3% respectively.Totally, the biological contact oxidation pond of combined medium has the best purification effect on nitrogen and phosphorus.The biological contact oxidation pond of elastic medium has the best purification effect on organic matter in raw water and followed by the biological contact oxidation pond of combined medium.