Aiming　at　the　seriousness　and　harmfulness　of　nitrogen　pollution,　in　order　to　protect　water　resources　and　human　health,　this　paper　outlines　nitrogen　transport　and　transformation　process　in　the　groundwater.　Based　on　the　analysis　of　the　present　research　situation　about　nitrogen　transport　and　transformation　at　home　and　abroad,　the　authors　think　that　0-level　or　first-order　kinetics　hasn＇t　describe　nitrogen　transformation　under　the　action　of　nitrogen　nitrification　and　denitrification,　and　must　consider　the　role　of　microorganisms　in　the　nitrogen　transport　and　transformation　process,　which　has　been　the　development　trend　of　nitrogen　transport　and　transformation　at　the　home　and　abroad.　So,　by　the　solute　transform　theory　and　microbe　dynamics　theory,　based　on　the　present　research　situation　at　home　and　abroad,　this　paper　theoretically　gives　multi-component　solute　transport　and　transformation　model,　which　can　simultaneously　simulate　the　characterization　of　nitrogen,　oxygen,　organic　carbon　and　microbial　concentration,　all　of　these　can　provide　theoretic　basis　for　the　prevention　and　control　of　groundwater　in　the　nitrogen　pollution.　©　2011　IEEE.