OBJECTIVE： To establish a method for simultaneous determination of 4 triglyceride anti-tumor components in Coix lacryma seed oil. METHODS： HPLC-ELSD was adopted. The determination was performed on Inertsil ODS-3 C18 column with mobile phase consisted of acetonitrile-isopropanol （57 ∶ 43， V/V） at the flow rate of 1.0 mL/min. The column temperature was 30 ℃， and the sample size was 10 μL. Evaporative light scattering detector was used， the drift tube temperature was 70 ℃， and the gas flow rate was 2 L/min. Using glycerol trioleateas internal standard， relative correction factors （RCF） of linolein trilinolein， 1，2-linoleic acid-3-palmitic acid glyceride and 1-palmitic acid-2-oleic acid-3-linoleic acid glyceride were calculated respectively. The contents of above 3 components in C. lacryma seed oil were calculated by RCF. The contents of 4 components in C. lacryma seed oil were determined by external standard. The results of content determination by quatitative analysis of multi-components by single marker （QAMS） were compared with external standard method. RESULTS： The linear ranges were 0.15-4.50 μg for linolein trilinolein， 0.15-4.50 μg for 1，2-linoleic acid-3-palmitate， 0.35-10.50 μg for 1-palmitic acid-2-oleic acid-3-linoleic acid glyceride， 0.35-10.50 μg for glycerol trioleate （r≥0.999 5）. The limits of quantification were 0.13， 0.06， 0.07， 0.12 μg. The limits of detection were 0.04， 0.02， 0.02， 0.03 μg， respectively. RSDs of precision， stability， and repeatability tests were less than 2.0％（n＝6）. The average recoveries were 95.43％-102.67％（RSD＜2.0％， n＝6）. Average RCFs of linolein trilinolein， 1，2- linoleic acid-3-palmitic acid glyceride and 1-palmitic acid-2- oleic acid-3-linoleic acid glyceride were 0.31， 0.88， and 1.21， respectively. RCFs reproducibility was perfect under different experiment conditions. There was no significant difference in results of content determination between QAMS and external standard method （P＞0.05）. CONCLUSIONS： The method is simple， rapid， accurate and reliable. It is used for simultaneous determination of linolein trilinolein， 1， 2-linoleic acid-3-palmitate， 1-palmitic acid-2-oleic acid-3-linoleic acid glyceride and glycerol trioleateas in C. lacryma seed oil.