In 2020, Lianhua station was selected to conduct manual sampling in the area with high PM_2.5 value in Taizhou city. The mass concentration, elemental composition, ion, organic carbon and elemental carbon of PM_2.5 were analyzed. Positive Matrix Factorization (PMF) was used for source apportionment. The results showed that the main components of the atmospheric PM_2.5at Lianhua were organic matter (OM, 35.7%), nitrate (NO³_-, 25.6%), sulfate (SO⁴_2-, 13.9%), ammonium (NH⁴₊,11.9%), crustal material (6.1%), chloride (Cl_-, 2.3%), potassium (K₊, 1.5%), elemental carbon (EC, 1.5%), trace elements (0.8%) and sodium (Na₊, 0.7%). The organic matter, nitrate, sulfate and ammonium were the four primary pollutants which totally accounted for 87.1% of the atmospheric PM_2.5. According to the apportionment results and the pollution characteristics, a series of control measures were proposed to deal with the regional PM_2.5 pollution, such as optimizing the structure of urban road networks, enhancing the control of flying dust, banning coal combustion furnance and straw buurning, and so on .