Polypyrrole　(PPy)　based　fiber-shaped　supercapacitor　(FSSC)　is　attracting　increasing　attention　as　energy　storage　devices　of　flexible　and　wearable　electronic　products　in　recent　years.　However,　its　application　is　limited　by　the　low　specific　capacitance　and　poor　rate　capability,　mainly　suffering　from　inferior　conductivity　and　inhibited　ions　channels　of　fiber　electrode.　Here,　a　high-performance　flexible　FSSC　is　constructed　based　on　hierarchically　interconnected　porous　poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate)　(PEDOT:PSS)/PPy　composite　fiber　prepared　by　in　situ　chemical　polymerization　of　pyrrole　on　a　novel　highly-conductive　PEDOT:PSS　hydrogel　support.　The　good　electronic　and　ionic　conductor　properties,　hierarchically　porous　structure　and　p-p　interaction　of　conducting　polymer　hybrid　fiber　ensure　fast　electrons　transfer/ions　diffusion　and　the　efficient　utilization　of　whole　electrode.　Benefiting　from　the　well-designed　hybrid　architecture　and　synergistic　effect,　the　PEDOT:PSS/PPy　hybrid　fiber　in　FSSC　exhibits　superb　volumetric/areal/length　specific　capacitance　(393.8　F　cm(-3),　770.6　mF　cm(-2)　and　18.9　mF　cm(-1)　at　2.0　A　cm(-3))　and　excellent　rate　performance　(52.8%　capacitance　retention　even　at　ultrahigh　current　density　of　50　A　cm(-3)).　The　FSSC　device　displays　record-high　energy　density　(8.3　mWh　cm(-3)　or　16.2　mu　Wh　cm(-2)　at　such　a　high　power　density　of　389.1　mW　cm(-3)　or　761.5　mu　W　cm(-2))　compared　to　other　previously-reported　PPy　based　FSSCs,　as　well　as　long-term　cycle　stability　and　exceptional　flexibility.　The　outstanding　electrochemical　and　flexural　performances　of　our　PPy　based　FSSC　are　competent　for　portable　and　wearable　electronics.