Handan　was　the　most　seriously　ozone　polluted　city　compared　with　surrounding　cities.　This　paper　was　analyzed　the　spatial　and　temporal　distribution　characteristics　of　ozone　in　Handan　by　using　monitoring　data.　The　analysis　showed　that　ozone　pollution　was　very　serious　during　research　period　and　the　standard　exceeding　rate　of　days　was　86.7%　in　Handan.　Ozone　concentration　exhibited　spatial　variations　over　the　research　regions.　The　main　causes　of　ozone　pollution　were　influenced　from　elevated　temperature,　low　humidity　and　transmission　of　southerly　air　masses.　Then　comprehensive　air　quality　model　extensions　CAMx　based　ozone　source　apportionment　technology　(OSAT)　was　applied　to　quantify　the　contributions　of　different　emissions　to　ozone　concentration　in　different　receptors　of　Handan.　The　analysis　revealed　that　the　ozone　pollution　in　Handan　had　strong　regional　contribution.　Local　emissions　to　ozone　pollution　of　administrative　region　had　reached　43.9%,　while　obvious　increase　of　ozone　contribution　to　urban　areas　came　from　local　emissions　(46.5%).　Chen＇an　was　the　most　seriously　ozone　polluted　county　in　Handan,　while　ozone　pollution　in　Chen＇an　resulted　from　both　local　emissions　(37.4%)　and　from　Henan.　Compared　with　monthly　average,　local　emissions　for　the　typical　ozone　pollution　process　tended　to　have　more　ozone　contribution　(54.0%).　Divided　by　source　sectors,　the　largest　contributors　to　ozone　of　main　urban　areas　were　local　mobile　pollution　sources.　While　for　the　typical　ozone　pollution　process,　the　largest　contributors　turned　into　local　metallurgical.　Sensitivity　analysis　of　model　photochemical　ozone　generation　showed　that　under　monthly　average　most　of　ozone　in　main　urban　areas　were　generated　in　VOCs　sensitive.　While　for　the　typical　ozone　pollution　process,　the　proportion　of　ozone　generated　in　NOx　sensitive　had　been　increased.　©　2021,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.