In　order　to　enhance　the　fuel　economy　of　plug-in　fuel　cell　vehicles,　the　electric　energy　consumption　rate　of　the　traction　battery　is　controlled　by　adjusting　the　objective　cost　function　through　the　adaptive　rule　of　equivalent　coefficient　S　and　driving　range　based　on　the　equivalent　hydrogen　consumption　minimization　strategy　(ECMS).　Meanwhile　the　reference　SOC　is　introduced　to　modify　the　equivalent　coefficient　for　enabling　the　traction　battery　get　as　much　electric　energy　as　possible　from　power　grid　in　the　course　of　driving,　and　avoiding　the　excessive　discharge　of　the　battery,　thus　to　achieve　the　adaptiveness　of　the　control　strategy　to　various　driving　ranges.　Then　the　simulation　model　for　the　plug-in　fuel　cell　vehicle　is　established　with　Matlab/Simulink　and　the　results　of　simulation　show　that　when　the　mileage　exceeds　the　pure　electric　driving　range,　the　strategy　can　control　the　traction　battery　with　its　SOC　reaching　the　target　value　at　the　end　of　driving　course.　The　results　of　contrastive　hardware-in-the-loop　test　indicate　that　the　hydrogen　consumptions　in　the　total　mileage　of　100,150　and　200　km　with　mileage　adaptive　ECMS　are　8.75%,　14.21%　and　16.63%　respectively　less　than　that　with　CD-CS-based　ECMS.　©　2019,　Society　of　Automotive　Engineers　of　China.　All　right　reserved.