Abstract: Obstructive sleep apnea （OSA） exhibits a high prevalence during pregnancy and serves as an independent risk factor for hypertensive disorders during pregnancy, preeclampsia, and gestational diabetes mellitus. Moreover, it readily leads to various adverse pregnancy outcomes, such as preterm birth and low birth weight. Timely treatment plays a crucial role in improving OSA during pregnancy and may even reverse adverse pregnancy outcomes. Positive airway pressure （PAP） is the preferred treatment for OSA, and its application in pregnant patients is increasingly receiving attention. This review provides a comprehensive review of the current status of positive airway pressure （PAP） therapy for obstructive sleep apnea （OSA） during pregnancy, delving into the positive impacts of PAP on alleviating OSA symptoms during pregnancy, controlling the progression of gestational hypertension and hyperglycemia, and improving biomarkers in the body. The aim is to enhance the awareness of clinical practitioners towards the diagnosis and treatment of OSA during pregnancy and to provide reference for clinical treatment.