Objective To clarify the causes of delayed medical seeking among patients with Chronic Obstructive Pulmonary Disease （COPD）, and to provide references for guiding COPD patients to seek medical treatment in time. Methods A semi-structured interview was conducted among 15 COPD patients with delayed medical seeking, then content analysis method was utilized to analyze and refine the interview data. Results Respondents′ delayed medical seeking length was 20-90 days. Five topics were refined on the causes of delayed medical seeking: self-management and temporary relief, self-judgment errors of illness, compromising on disease symptoms, lack of personal medical ability and limitation of medical conditions. Conclusion Delayed medical seeking is widespread among COPD patients, patients and their families should learn to correctly judge the timing of medical treatment and change their bad medical habits. Medical staff and relevant social departments should pay attention to the health education of patients and their families, and provide necessary support to guide COPD patients seeking medical treatment in time.