A　more　desirable　method　was　developed　for　the　determination　of　fatty　acid　esters　of　3-chloropropane-1,2-diol　(3-MCPD　esters)　and　2-chloropropane-1,3-diol　(2-MCPD　esters)　in　vegetable　oils.　The　conditions　of　hydrolysis,　derivatization　and　extraction　of　the　vegetable　oil　were　optimized.　The　oil　sample　added　with　the　isotopic　labelled　d(5)-3-MCPD　ester　and　d(5)-2-MCPD　ester　was　hydrolyzed　with　0.50　mL　of　sodium　methoxide　(0.50　mol/L)　for　1　min.　And　then　the　solution　was　derivatized　with　0.25　mL　of　phenylbroronic　acid　solution,　then　the　solution　was　neutralized　with　3.0　mL　acetic　acid　and　cleaned　up　with　3.0　mL　of　hexane　2　times.　The　derivatized　solution　was　extracted　with　2.0　mL　of　ethyl　acetate　3　times.　The　extract　was　dried　at　nitrogen　flow　and　the　residue　was　dissolved　with　0.5　mL　of　isooctane,　and　then　detected　by　gas　chromatography-mass　spectrometry.　Under　the　optimized　conditions,　the　response　of　MCPD　esters　was　15-33　times　of　that　of　DGF　method　and　the　relative　percentage　of　isooctane＇s　impurities　removal　was　as　high　as　99.1%　compared　with　that　of　ethyl　acetate.　The　method　performance　was　fully　validated.　Limit　of　detection　(S/N　=　3)　and　quantitation　of　MCPD　ester　were　65.0-76.0　mu　g/kg　and　210-250　mu　g/kg,　respectively.　There　was　an　excellent　linear　correlation　between　the　ratio　of　the　MCPD　and　its　internal　standard　and　the　mass　(r＞0.9990)　in　the　range　of　25-500　ng　of　MCPD　esters　(shown　by　MCPD).　When　peanut　oils　was　spiked　with　MCPD　esters　at　levels　of　250-1000　mu　g/kg　(n　=　6),　average　recoveries　were　81.1%-92.3%　and　103%-120%,　and　relative　standard　deviation　(RSD)　was　6.3%-12.4%　and　5.0%-9.5%,　respectively.　An　excellent　result　was　obtained　with　-0.5　of　Z　scope　when　the　method　was　used　for　3-MCPD　ester　proficiency　test　sponsored　by　Food　Analysis　Performance　Assessment　Scheme.　It　was　concluded　that　the　developed　method　was　much　better　than　DGF　method　(Deutsche　Gesellschaft　fur　Fettwissenschaft　Standard　Method(III　186(2009)),　especially　in　sensitivity,　accuracy　and　preventing　the　contamination　of　GC-MS　systems.