The present invention relates to Coix seed oil extracted from Semen Coicis, pharmaceutical preparations thereof, and the use thereof in the treatment of tumors. Specifically, the Coix seed oil contains 11 triglyceride ingredients in the following mass percentages: trilinolein 4.87-6.99%, 1-olein -2,3-dilinolein 13.00-18.69%, 1-palmitin-2,3-dilinolein 5.25-7.54%, 1,3-diolein-2- linolein 13.23-19.02%, 1-palmitin-2-linolein-3-olein 10.26-14.75%, 1,3-dipalmitin-2-linolein 2.28- 3.28%, triolein 14.44-20.76% and 1-palmitin-2,3-diolein 8.06-11.58%, 1-olein-2-linolein-3-stearin 1.37-1.97%, 1,3-dipalmitin-2-olein 1.52-2.19% and 1,2-diolein-3-stearin 1.29-1.86%.
