The　outstanding　high-strength　of　high-entropy　alloys　(HEAs)　depends　on　a　synergistic　effect　of　various　strengthened　methods,　such　as　precipitation　strengthening.　However,　the　precipitates　hamper　the　corrosion　resistance　by　common　understanding,　leading　to　a　reduced　ability　of　these　precipitation　strengthened　HEAs　to　withstand　complex　environments.　In　this　work,　we　proposed　a　boron-doping　strategy　to　regulate　the　conflict　between　mechanical　properties　and　corrosion　resistance　in　an　equiatomic　FeCrNiCoMn　HEA,　and　revealed　the　role　of　boron　in　microstructure　and　properties.　As　expected,　as　the　boron-doping　content　raised　from　1　to　4　at%,　the　strengths　gradually　enhanced,　due　to　the　strengthening　effect　of　boride　precipitates　at　grain　boundaries　in　addition　to　grain　refinement.　Particularly,　the　yield　strength　(YS)　increased　twice　compared　to　that　of　boron-free　reference　alloy,　reaching　similar　to　425　MPa.　Different　from　the　conventional　experience　in　the　effect　of　precipitates,　the　addition　of　boron　led　to　the　decreases　in　both　corrosion　potential　(E-corr)　and　current　density　(I-corr)　values　in　3.5　wt%　NaCl　solution.　Among　these　HEAs,　the　FeCrNiCoMn　HEA　with　1　at%　boron　doping　exhibited　the　best　corrosion　resistance,　which　was　attributed　to　the　competition　between　grain　refinement　and　boride　precipitation.　The　proper　boron　doping　led　to　pronounced　grain　refinement　by　more　than　20　%,　which　promoted　the　rapid　formation　of　a　less　defective　and　more　stable　passive　film,　thus　prevailing　over　the　detrimental　effect　of　boride　precipitates　by　inducing　Cr-depleted　zones.　Therefore,　the　strength　and　corrosion　resistance　of　the　FeCrNiCoMn　HEA　were　simultaneously　improved　by　doping　1　at%　boron.　The　present　results　demonstrate　an　effective　strategy　to　regulate　the　balanced　properties　of　precipitation　strengthened　HEAs　and　provide　an　inspiration　for　future　works　aiming　to　develop　these　materials　with　adequate　suitability　in　various　applications.