Objective To investigate the effect of Spiriva Respimat on acute exacerbation of COPD with benign prostatic hyperplasia(BPH). Methods The 167 patients who were hospitalized for acute exacerbation of chronic obstructive pulmonary disease (COPD)(aged 51～96 years) with an average age of (74.26±7.6) years and the 82 patients treated with Spiriva Respimat in the department of respiratory and critical care medicine of our hospital from September 2017 to September 2019 were reviewed. In our pilot study, 48 AECOPD patients with BPH patients were enrolled as the treatment group and another 45 similar cases as the control group. In the former group Spiriva Respimat was administered and the control group was not. Results There were 45 patients (52.94%) with BPH in AECOPD group and 48 patients (58.53%) with BPH in Spiriva Respimat group. There was no statistical significance between the two groups (P>0.05). Among them, 10 patients (11.76%) with AECOPD and BPH had frequent urination and night urination, 4 patients (4.7%) of urinary retention, 16 patients (18.82%) who had oral Harnal and Finasteride, 5 patients (5.8%) need catheterization. In the AECOPD patients with BPH treated with Spiriva Respimat, 7 patients (8.53%) had frequent urination and night urination, 1 patient (1.21%) had urinary retention, 20 patients (24.39%) had oral Harnal and Finasteride, and 3 patients (3.6%) were managed through catheterization (P>0.05). Conclusion Spiriva Respimat does not increase the acute exacerbation of COPD patients with BPH, nor does it increase the use of drugs to treat BPH. It is safe to treat COPD patients with BPH in stable stage.