Voltage　flicker　will　interfere　with　the　power　quality　in　distribution　system　resulting　from　load　fluctuation.　The　flicker　intensity　detected　on　PCC　is　the　total　effect　of　all　loads　putting　in　PCC,　that　can＇t　help　to　evaluate　the　interference　of　single　load.　The　flicker　interference　injecting　into　system　is　relevant　to　the　operating　character　of　load　which　puts　up　as　the　correlation　of　voltage　and　current.　So,　it　can＇t　locate　the　flicker　source　just　according　to　the　voltage　analysis.　An　evaluation　method　is　proposed　in　this　paper,　which　tracks　the　load　impedance　in　lower　frequency　and　then　computes　the　flicker　intensity　of　PCC　resulting　from　the　only　load.　Its　feasibility　is　verified　with　a　simulation　case.