〔Abstract〕Objective： To evaluate bronchiectasis patients’ cellular immune state. Methods 33 patients with bronchiectasis admitted to Shenzhen Second People's Hospital from January 2018 to February 2019 were selected as bronchiectasis group, 42 patients with simple pulmonary infection were selected as pneumonia group, and 37 healthy people were selected as healthy group. Detect their cellular immune function, investigate their serum CD3、CD4、CD8 and vitamin D level, comparative analysis of their difference. Results The pneumonia patient group’s serum CD3、CD4、CD8 and vitamin D level were lower than healthy people group’s, the difference was not statistically signifi cant (P > 0.05). The bronchiectasis group’s serum CD3、CD4、CD8 and vitamin D level were signifi cantly lower than pneumonia group’s and healthy group’s, the differences were statistically signifi cant (P < 0.05). Conclusion Bronchiectasis patients’ cellular immune were disorders.