The　authors　had　studied　ultraviolet　absorption　spectrum　character　of　organic　contaminants　in　sewage　samples　collected　from　bathing　wastewater,　domestic　wastewater,　along　with　their　effluents　of　bio-treating　installation.　The　authors　put　forward　that　ultraviolet　absorption　spectrum　parameter　of　a　dissolved　organic　contaminants　in　sewage　correlates　with　the　traditional　comprehensive　index　of　organic　contaminant,　such　as　Chemical　Oxygen　Demand　(COD)　and　Total　Organic　Carbon　(TOC).　The　study　can　be　used　for　reference　of　on　line　wastewater　quality　measurement.　The　results　are　that　there　are　good　correlation　between　the　ultraviolet　absorption　parameters　including　UV　absorption　at　a　UV　wavelength　of　254　nm　(A254)　and　an　integral　UV　absorption　from　226　to　400　nm　of　UV　wavelength　ranges　(A226,400)　and　COD　or　TOC.　Then　preferable　correlation　is　in　A226,400　and　TOC,　which　shows　comprehensively　the　characters　of　organic　contamination　in　sewage.　Furthermore,　testing　A226,400　was　quicker,　easier　and　no　consumption　of　chemical　reagent.　It　was　an　environmental　water-quality　analysis　technique　and　can　be　a　substitute　for　traditional　comprehensive　index　of　organic　contaminant　in　sewage　to　a　certain　extent.