Objective To analyze the clinical effect of Qingfei Paidu Decoction in treating COVID19 pneumonia with Phlegmheat obstructing lung. Methods 229 patients with COVID19 pneumonia admitted to our hospital from December 2019 to March 2020 were analyzed. 125 patients with routine intervention were set as control group, and 104 patients with phlegmheat obstructing lung based on rehabilitation intervention strategy of Qingfei Paidu Decoction were set as observation group. The influence of two intervention methods on the clinical efficacy of patients were analyzed. Results The improvement rate of chest imaging in the observation group was significantly higher than that in the control group, while the negative time of nucleic acid and discharge time were significantly lower than those in the control group (P＜0.05). After intervention, SAS score and SDS score in observation group were significantly better than those in control group (P＜0.05). The total incidence of complications in the observation group was 50.96%(53 cases), which was significantly lower than that in the control group (70.40%, 88 cases), and the difference was significant (P＜0.05). Conclusion The rehabilitation intervention strategy based on Qingfei Paidu Decoction can effectively improve the clinical efficacy and negative psychology of patients with phlegmheat obstructing lung type COVID19 pneumonia, which deserves clinical attention.