Abstract: Objective The aim of this study was to learn about the working of AFP monitoring sys- tem in Linfen City after poliomyelitis eradication had been verified．Methods Statistical analysis was conducted in regard to reports of AFP cases in counties supervised by Linfen Municipality (including downtown area)．Results Since the goal of poliomyelitis eradication was realized，principle evaluation indexes of AFP monitoring quality in Linfen had addressed the requirements for successively 3 years，during which 47 cases of AFP were reported，with a ratio of male to female of 2.62：1；The reported cas-es occurred more frequently from May to August，which accounted for 42.55％ of the whole year；chil-dren who did not have OPV and full-course immunization occupied 23.41％：the consultancy rate of AFP eases was the highest at county-level medical agencies (38.30％)，whereas the reporting rate was low (44.44％)．Conclusion Guillain-Barr6 syndrome accounting for a large proportion of AFP cases in Linfen is the primary cause of more occurrences of AFP in Summer and Fall and more male patients than females．Henceforth it is advisable to enhance the training force of clinicians at county-level medical facil-ities to further improve OPV immunization rate．