To　improve　the　economy　of　a　plug-in　hybrid　fuel　cell　electric　vehicle　and　the　durability　of　the　fuel　cell,　an　equivalent　hydrogen　consumption　minimization　strategy　(ECMS)　was　developed　based　on　the　fuel　cell　degradation　model　with　feedback　optimal　control.　In　addition　to　the　hydrogen　consumption　of　the　fuel　cell　and　the　equivalent　hydrogen　consumption　of　the　battery,　the　open　circuit　voltage　decay　of　the　fuel　cell　was　converted　into　the　equivalent　hydrogen　consumption　and　added　to　the　target　cost　function.　The　demand　power　of　the　motor,　Pm,　and　the　battery　state　of　charge　were　considered　as　the　state　variables,　and　the　target　power　of　the　battery　was　set　as　the　control　variable.　The　target　power　of　the　battery　that　minimizes　the　target　cost　function　was　regarded　as　the　output　reference　target　power　of　the　battery.　The　limited　variation　value　of　the　fuel　cell　output　power　ΔPf　could　be　dynamically　adjusted　using　the　feedback　of　the　voltage　decay　rate　of　the　fuel　cell.　Finally,　the　target　power　of　the　fuel　cell　was　obtained.　The　forward　simulation　model　of　the　plug-in　fuel　cell　vehicle　was　established　on　MATLAB/Simulink,　and　the　driving　cycle　of　the　urban　dynamometer　driving　schedule　was　used　for　verification.　The　simulation　results　show　that　the　hydrogen　consumption　decreases　by　2.6%　and　the　open　circuit　voltage　decay　of　the　fuel　cell　decreases　by　4.1%　through　the　use　of　the　ECMS　with　feedback　control　under　the　charge　sustaining　phase,　as　compared　to　the　rule-based　strategy.　The　working　point　in　the　high　efficiency　of　the　fuel　cell　has　a　higher　proportion　under　the　ECMS　with　feedback　control　strategy　than　that　under　the　rule-based　strategy.　The　hydrogen　consumption　for　ΔPf　with　feedback　control　is　0.105　3　kg,　and　is　similar　with　values　of　0.102　9　kg　for　a　fixed　ΔPf　value　of　3　kW.　For　a　fixed　ΔPf　values　of　1kw　and　2　kW,　the　hydrogen　consumption　significantly　increases　to　0.121　3　kg　and　0.110　2　kg,　respectively.　Therefore,　the　fuel　cell　voltage　decay　rate　is　significantly　reduced　compared　with　that　in　the　fixed　ΔPf,　and　the　vehicle　economy　and　durability　of　fuel　cell　are　improved.　©　2019,　Editorial　Department　of　China　Journal　of　Highway　and　Transport.　All　right　reserved.