Organic　electrode　materials　are　promising　for　next‐generation　energy　storage　materials　due　to　their　environmental　friendliness　and　sustainable　renewability.　However,　problems　such　as　their　high　solubility　in　electrolytes　and　low　intrinsic　conductivity　have　always　plagued　their　further　application.　Polymerization　to　form　conjugated　organic　polymers　can　not　only　inhibit　the　dissolution　of　organic　electrodes　in　the　electrolyte,　but　also　enhance　the　intrinsic　conductivity　of　organic　molecules.　Herein,　we　synthesized　a　new　conjugated　organic　polymer　(COPs)　COP500‐CuT2TP　(poly　[5,10,15,20‐tetra(2,2′‐bithiophen‐5‐yl)　porphyrinato]　copper　(II))　by　electrochemical　polymerization　method.　Due　to　the　self‐exfoliation　behavior,　the　porphyrin　cathode　exhibited　a　reversible　discharge　capacity　of　420 mAh g−1,　and　a　high　specific　energy　of　900 Wh Kg−1　with　a　first　coulombic　efficiency　of　96 %　at　100 mA g−1.　Excellent　cycling　stability　up　to　8000 cycles　without　capacity　loss　was　achieved　even　at　a　high　current　density　of　5 A g−1.　This　highly　conjugated　structure　promotes　COP500‐CuT2TP　combined　high　energy　density,　high　power　density,　and　good　cycling　stability,　which　would　open　new　opportunity　for　the　designable　and　versatile　organic　electrodes　for　electrochemical　energy　storage.