〔Abstract〕 Objective To observe the clinical effect of Fexinkang capsule on chronic pulmonary heart disease with phlegm and blood stasis obstructing lung-type and its effect on blood gas. Methods A total of 40 patients with chronic pulmonary heart disease of phlegm and blood stasis obstructing lung type were selected from Yiyang First Hospital of Traditional Chinese Medicine from December 2016 to March 2019. They were divided into observation group and control group according to the order of admission, with 20 cases in each group.The control group was given conventional western medicine treatment. The observation group was given Feixinkang capsule on the basis of the control group. The comprehensive curative effect, blood gas analysis and other curative effect indexes of the two groups of patients were evaluated. Results The proportion of clinical control in the observation group was higher than that in the control group, and the difference was statistically significant (P < 0.05). After treatment, the arterial blood carbon dioxide partial pressure in the observation group was lower than that of the control group, and the arterial blood oxygen partial pressure was higher than that of the control group, the differences were statistically significant (P < 0.05). There was no statistically significant difference in the incidence of adverse reactions between the two groups of patients (P > 0.05). After treatment, the complement C3 and E-rosette formation rates in the two groups were increased to varying degrees, and the complement C3 and E-rosette formation rates in the observation group were higher than those in the control group after treatment, and the differences were statistically significant (P < 0.05). Conclusion Feixinkang capsule combined with western medicine treatment can improve the comprehensive clinical efficacy and improve the symptoms and signs of patients.