Chronic thromboembolic pulmonary hypertension ( CTEPH) is a severe form of pulmonary hypertension ( PH), and is classified as the fourth major category of pulmonary arterial hypertension. CTEPH is primarily caused by chronic thrombosis, leading to the obstruction of blood flow in the pulmonary arteries and result ing in a sustained increase in pulmonary artery pressure. The unclear pathogenesis of CTEPH, however, means that its early diagnosis is challenging, treatment options are limited, and prognosis assessment is often inaccurate. In-depth research into these mechanisms will thus improve our understanding of the pathophysiological processes of CTEPH,and also provide a theoretical basis for developing new therapeutic strategies. This review focuses on the current method of establishing CTEPH rat models and their advantages and disadvantages, offering researchers a reference for selecting and constructing CTEPH rat models.