As　an　emerging　method　of　intracardiac　wireless　communication,　conductive　intracardiac　communication　(CIC)　has　the　advantages　of　low　power　consumption　and　high　security　of　information　transmission,　and　is　suitable　for　synchronization　between　multiple　leadless　pacemakers　(LCPs).　However,　the　complicated　intracardiac　environment　increases　the　measurement　uncertainty　of　intracardiac　channel　parameters,　and　current　research　on　intracardiac　communication　does　not　take　into　account　impedance　mismatch.　These　may　lead　to　unreliable　communication　between　LCPs.　In　this　paper,　an　equivalent　circuit　model　of　the　intracardiac　channel　is　constructed　based　on　the　electrical　characteristics　of　cardiac　tissue.　The　intracardiac　channel　uses　an　L-type　impedance　matching　circuit　to　improve　the　channel　gain.　The　results　show　that　the　channel　gain　increases　by　more　than　7　dB　after　adding　the　impedance　matching　circuit.　Especially,　the　most　significant　increase　is　8.33　dB　at　10MHz.　This　proves　the　feasibility　of　the　impedance　matching　method　and　provides　an　effective　solution　for　the　future　design　of　intracardiac　communication　transceivers.