The　study　researches　kinetics　of　UV　disinfection　of　reclaimed　water,　and　obtained　relevant　parameters.　It　shows　that　the　bacteria　reaction　order　and　the　total　coliform　reaction　order　are　very　close　to　1,　when　the　turbidity　is　less　than　15NUT　and　the　initial　consistence　of　bacteria　is　less　than　1.0×106CFU/mL.　The　ultraviolet　disinfection　process　can　be　viewed　as　first　order　kinetics　of　optical　biochemistry.　The　first　sterilization　rate　constant　of　bacteria　equals　to　0.220-0.309　cm2/(mW·s),　and　that　of　total　coliform　equals　to　0.327-0.340　cm2/(mW·s).