Based　on　method　552.3　that　is　a　standard　method　recommended　by　the　USEPA　for　the　determinations　of　disinfection　byproduct　HAAs　in　drinking　water,　the　determination　method　of　haloacetic　acids　(HAAs)　in　reclaimed　water　was　proposed　by　optimizing　the　course　of　sample　pretreatment　and　changing　the　detection　approach.　The　method　included　acidified　extraction,　derivatization,　neutrallzed　extraction,　and　GC-MS,　and　the　method　was　used　to　analyze　four　kinds　of　HAAs　disinfection　byproduct　in　reclaimed　water　samples　located　at　a　northern　city　of　China.　The　result　showed　that　the　method　can　effectively　eliminate　coexist　disturbance　applying　to　China＇s　reclaimed　water　quality　and　has　good　precision　giving　RSD　(n=7)　of　below　10%,　detection　limit　is　basically　the　same　as　the　USEPA　method,　recovery　rate　of　water　samples　meet　the　USEPA　6251B　(100　±　30)%　requirements　and　four　kinds　of　HAAs　concentration　in　reclaimed　water　are　a　few　times　higher　than　in　tap　water,　which　has　some　potential　hazards　to　the　environment　and　human.