Objective To analyze the relationship between serum a proliferation inducing ligand(APRIL)and galactin-1(Gal-1)levels with clinical features and prognosis in patients with epithelial ovarian cancer(EOC).Methods EOC patients(n=132)who admitted in Handan Hangang Hospital of Hebei Province from January 2018 to June 2020 were selected as the cancer group,and were grouped into a survival group(n=56)and a death group(n=76)based on their three-year survival after discharge.Meanwhile,healthy in-dividuals(n=68)who underwent physical examination were regarded as the healthy group.Enzyme linked immunosorbent assay was applied to detect serum APRIL and Gal-1 levels in all subjects.Clinical data of all patients were collected and their relationship with serum APRIL,Gal-1 levels and prognosis was analyzed.Ka-plan-Meier method was applied to analyze the relationship between serum APRIL and Gal-1 levels and the prognosis of EOC patients.Cox regression was applied to analyze the relevant factors affecting the prognostic death of EOC patients.The prognostic value of serum APRIL in patients with EOC was analyzed by receiver operating characteristic(ROC)curve.Results The serum APRIL and Gal-1 expression levels in the cancer group were greatly higher than those in the healthy group,and the differences were statistically significant(P＜0.05).The serum APRIL and Gal-1 levels in the death group were greatly higher than those in the sur-vival group,and the differences were statistically significant(P＜0.05).Clinical data analysis showed that se-rum APRIL and Gal-1 levels were not related to the age of EOC patients(P＞0.05),but were related to tumor location,tumor diameter,The International Febderation of Gynecology and Obstetrics(FIGO)staging,differentiation degree,lymph node metastasis,histological classification,and levels of cancer antigen 125(CA125)and human epididymis protein 4(HE4),and FIGO staging,differentiation degree,lymph node me-tastasis,histological classification,and levels of CA125 and HE4 also significantly affected the prognosis of pa-tients(P＜0.05).FIGO stage Ⅲ+Ⅳ,low differentiation,lymph node metastasis,serous tissue classification,CA125≥200 U/mL,HE4≥200 pmol/L,and high expression of APRIL and Gal-1 were all risk factors for prognostic death in EOC patients(P＜0.05).The three-year survival rate of APRIL high expression patients(25.37％)was greatly lower than that of APRIL low expression patients(60.00％),and the three-year sur-vival rate of Gal-1 high expression patients(27.94％)was greatly lower than that of Gal-1 low expression pa-tients(57.81％),,and the differences were statistically significant(P＜0.05).ROC curve showed that the ar-ea under the curve(AUC)of the combination of APRIL and Gal-1 for predicting the prognosis was 0.925,which was significantly higher than that of the diagnosis of the two alone,(Zcombined-APRIL=4.061,P＜0.001,Zcombined-Gal-1=3.424,P＜0.001),with a sensitivity and specificity of 86.84％and 83.93％,respectively.Conclu-sion The expression levels of serum APRIL and Gal-1 are greatly elevated in EOC patients,and their levels are related to tumor location,tumor diameter,FIGO staging,lymph node metastasis,histological classifica-tion,CA1 25,HE4,and differentiation degree.The expression levels of both have great application value in the prognosis evaluation of EOC patients.