Some embodiments of the disclosure provide new uses of trans-1,3-dilinolein as medicaments and food. In an embodiment, an application of trans-1,3-dilinolein in the preparation of stomachic tonic and an application thereof include the preparation of medicaments for treating gastric cancer. Cell experiments show that trans-1,3-dilinolein promotes the proliferation of human gastric mucosal epithelial cell line GES-1 under normal oxygen and hypoxic conditions and it has concentration-dependent killing effect on human gastric cancer cell line HGC-27 and killing effect on hypoxic gastric cancer cells. At a concentration of 300 μm and more, trans-1,3-dilinolein kills gastric cancer cells significantly and the killing effect becomes more significant under hypoxic conditions.