The　interactions　of　medical　devices　within　the　body　area　network　(BAN)　have　significantly　alleviated　the　pressure　on　healthcare　resources　attributed　to　an　aging　society.　However,　the　low-power,　high-reliability　wireless　communications　among　these　devices　are　susceptible　to　the　influence　of　the　human　body.　This　paper　exploits　the　capacitive　effects　of　human　tissues　to　achieve　precise　and　reconfigurable　impedance　matching　in　magnetic　resonance　coupling　(MRC)　human　body　communication　to　minimize　the　adverse　effects　of　the　human　body.　First,　the　impact　mechanism　of　the　human　body　on　MRC　port　impedance　is　analyzed　in　this　paper　under　the　inductive　near-field　based　on　the　dielectric　dispersion　of　human　tissues.　This　mechanism　helps　identify　the　quasistatic　magnetic　field　within　MRC,　from　which　the　resonance　conditions　of　MRC　are　derived.　A　reconfigurable　impedance　matching　method　within　a　broad　bandwidth　is　proposed　using　these　conditions,　and　experiments　on　port　impedance　and　transmission　characteristics　are　conducted　using　an　optimized　variable　parameter　coil　as　the　implementation　medium.　Results　demonstrate　that　the　proposed　method　can　precisely　tune　within　a　range　of　10　MHz　under　inductive　near-field,　confirming　the　reliability　of　the　resonance　conditions　and　matching　methodology.　After　matching,　the　MRC　exhibits　only　12.5　dB　@13.56　MHz　path　loss　over　a　90　cm　transmission　distance,　surpassing　other　methods　by　more　than　52.8%.　The　optimized　MRC　provides　an　effective　technical　foundation　for　narrowband　communication　schemes　of　medical　devices　in　the　BAN.　IEEE