Non-criteria　air　pollutants,　namely,　sulfur　trioxide　(SO3)　and　condensable　particulate　matter　(CPM),　are　attracted　more　attention　due　to　the　non-negligible　emission.　In　this　work,　the　migration　and　emission　characteristics　of　SO3　and　CPM　were　investigated　in　two　typical　coal-fired　power　plants　using　the　isopropanol　absorption　method　and　the　dry　impinger　method,　respectively.　One　of　the　power　plants　was　equipped　with　two-stage　wet　flue　gas　desulfurization　(WFGD)　and　the　other　one　was　self-generation　power　plant　using　Zhundong　coal　equipped　with　one-stage　WFGD.　The　mass　concentrations　of　SO3　and　CPM　were　measured　at　the　inlet　and　outlet　of　the　air　pollution　control　devices.　To　further　understand　the　removal　characteristics,　the　chemical　compositions　in　organic　and　inorganic　fractions　of　CPM　were　analyzed.　Based　on　the　measurement　data,　the　emission　factors　of　CPM　and　SO3　were　calculated.　The　final　emissions　of　SO3　range　from　2.16　to　2.29　mg•Nm−3　and　the　emission　factor　is　0.024–0.040　kg/(t　of　coal).　The　stack　emissions　of　filterable　particulate　matter　all　meet　the　ultra-low　emission　standard　and　are　less　than　5　mg•Nm−3.　However,　CPM　emissions　all　exceed　10　mg•Nm−3　and　account　for　more　than　85%　in　total　particulate　matter.　CPM　concentrations　are　notable　and　the　emissions　should　not　be　ignored.　In　both　power　plants,　WFGD　and　wet　electrostatic　precipitator　can　reduce　the　emission　of　organic　fraction　in　CPM;　while　one-stage　WFGD　has　negative　effect　on　the　mitigation　of　inorganic　fraction　in　CPM　with　the　concentrations　of　water-soluble　ions　NH4+,　SO42-　and　Cl−　increasing　by　41.37%,　52.22%　and　91.73%,　respectively.　©　2020　Energy　Institute