The　conventional　harmonic　responsibility　determination　method　needs　the　specialized　equipment　to　measure　harmonic　voltages　and　currents　of　users　synchronously,　therefore　its　engineering　applications　are　limited.　In　this　paper,　a　method　for　the　responsibility　determination　of　multiple　harmonic　sources　based　on　interval-type　monitoring　data,　which　is　the　asynchronous　measurement　data　from　harmonic　monitoring　devices,　is　proposed.　First,　interval　monitoring　samples　are　constructed　from　the　existing　harmonic　monitoring　data.　Then,　the　scenarios　are　divided　by　the　linear　dynamic　clustering　algorithm　based　on　the　parameterized　method　to　ensure　that　the　harmonic　impedance　variation　and　the　background　harmonic　voltage　fluctuation　are　kept　in　a　small　range　in　each　scenario.　Subsequently,　the　interval　linear　equations　for　quantification　of　harmonic　responsibility　are　established　and　the　interval　parameters　are　identified　by　the　correlation　data　selection　method.　Finally,　a　harmonic　responsibility　interval　index　is　proposed　to　evaluate　the　harmonic　responsibility　of　harmonic　sources　quantitatively.　The　feasibility　and　effectiveness　of　the　proposed　method　are　verified　by　simulation　and　arithmetic　cases.　©2023　Chin.Soc.for　Elec.Eng.