1-Stearoyl-2-eicosapentaenoyl-sn-glycero-3-PE (PE (18:0/20:5) ) is a phospholipid identified in plasma lipid profile analysis, with similar lipid level changes in high-grade cervical intraepithelial neoplasia and cervical cancer compared with normal state and low-grade cervical intraepithelial neoplasia, and can be used to monitor cervical cancer progression.