Objective To analyze the status of participation in medical decision-making during pregnancy in patients with hypertensive disorders of pregnancy (HDP) and its influencing factors. Methods A total of 119 patients with HDP admitted to the Affiliated Hospital of Putian University from February 2022 to December 2023 were enrolled as research subjects. The Patient Participation in Treatment Decision-Making Questionnaire was used to evaluate their level of participation in medical decision-making. A general information questionnaire, Social Support Rating Scale, Chinese version of the Decision Self-Efficacy Scale, and the Patients Attitude toward Participation in Medical Decision-Making Questionnaire were used to collect general data and assess social support level, decision self-efficacy level, and attitude toward participation in medical decision-making. The multivariate logistic regression model was used to identify independent influencing factors for participation in medical decision-making during pregnancy in patients with HDP. Results Among the 119 HDP patients, 38 (31.93%) had a low participation level in medical decision-making. Multivariate logistic regression analysis showed that education level below senior high school (OR=2.745, 95%CI: 1.218-6.187), no history of adverse pregnancy outcomes (OR=2.333, 95%CI: 1.037-5.251), low social support level (OR=2.642, 95%CI: 1.163-6.000), low decision self-efficacy level (OR=2.857, 95%CI: 1.275-6.404), and negative attitude toward participation in medical decision-making (OR=2.802, 95%CI: 1.260-6.231) were independent risk factors for low participation level in medical decision-making during pregnancy in patients with HDP (all P<0.05). Conclusion Participation level in medical decision-making during pregnancy in HDP patients needs to be improved, and it is influenced by education level, history of adverse pregnancy outcomes, social support level, decision self-efficacy level, and attitude toward participation in medical decision-making. In light of the aforementioned factors, it is imperative that future endeavors be directed toward ameliorating outcomes through the implementation of multifaceted strategies, incorporating enhanced stratified health education, a strengthened social support system, self-efficacy interventions, and psychological counseling.