Abnormal lipid metabolism and lipid metabolic reprogramming are closely related to the development of tumor.Lipidomics,as an emerging omics in recent years,can reveal the pathogenesis of tumor through comprehensive and systematic analysis of lipids,the molecules and metabolites with which they interact in tumor patients.Lipidomics provides new ideas for screening biomarkers and biological targets for the prediction,early diagnosis,treatment and prognosis of gastric cancer.