Abstract:〔Abstract〕 Objective To investigate the effect of nifedipine combined with labetalol on the concentrations of soluble Fmslike tyrosine kinase-1 (sFlt–1) and placental growth factor (PLGF) in patients with preeclampsia. Methods 380 patients with preeclampsia who were treated in the First Affiliated Hospital of Zhengzhou University from April 2021 to April 2022 were selected, and divided them into an observation group and a control group according to simple random method, with 190 cases in each group. The control group was treated with magnesium sulfate + nifedipine, and the observation group was treated with labetalol on the basis of the control group. The blood and urine indexes [urinary creatinine (UCr), 24 h urine protein quantitation (24h UPQ), serum brain natriuretic peptide (BNP), sFlt-1, PLGF], blood pressure [systolic blood pressure (SBP), diastolic blood pressure (DBP)], ultrasound examination indicators [blood flow resistance index (RI), umbilical artery blood flow velocity peak-to-valley ratio (S/D) and pulsatility index (PI)], and pregnancy outcomes. Results After treatment, the levels of UCr, 24h UPQ, serum BNP, sFlt-1, SBP, DBP, RI, PI and S/D in the observation group were lower than those in the control group, and the level of serum PLGF was higher than that in the control group, the differences were statistically significant (P < 0.05 ); The total incidence of adverse pregnancy outcome in the observation group was 13.16 %, lower than 25.26 % in the control group, and the difference was statistically significant (P < 0.05). Conclusion Combined application of nifedipine and labetalol in patients with preeclampsia can reduce UCr and blood pressure levels, relieve proteinuria symptoms, improve uterine artery blood flow, and improve pregnancy outcomes.