In　recent　years,　the　concept　of　the　negative　resistor　(NR)　has　been　proposed　and　applied　in　the　magnetic　coupled　wireless　power　transfer　(MC-WPT)　system　to　improve　the　stability　of　power　transfer.　However,　it　remains　a　fundamental　challenge　to　find　the　characteristic　differences　and　applications　of　the　four　basic　NR-based　MC-WPT　topologies.　In　this　paper,　the　circuit　models　of　the　four　basic　NR-based　MC-WPT　topologies:　series-series　(SS),　series-parallel　(SP),　parallel-parallel　(PP),　and　parallel-series　(PS)　are　established,　and　their　characteristics　are　analyzed　and　compared　by　using　circuit　theory,　which　enables　engineers　to　determine　and　select　topologies　to　suit　different　applications　and　requirements.　Theoretical　analysis　shows　that　the　compensation　methods　of　the　transmitter　and　receiver　of　the　NR-based　MC-WPT　system　would　affect　the　operating　frequency　and　output　characteristics　of　the　system.　Moreover,　by　comparative　analysis,　the　conditions　and　applicable　ranges　for　a　stable　output　of　different　topologies　were　provided.　Finally,　the　experimental　prototypes　are　set　up　by　using　the　power　electronic　inverter　and　operational　amplifier,　and　the　voltage　gain　ratios　of　the　four　basic　NR-based　WPT　topologies　under　the　variations　of　transfer　distance　and　load　are　observed.　The　experimental　results　validate　the　correctness　of　the　theoretical　analysis.　©　2023　by　the　authors.