Objective To understand the status of sedentary behavior in stable COPD patients, and to analyze its influencing factors, so as to provide a reference for developing targeted intervention. Methods A total of 233 COPD patients were selected using convenience sampling from outpatient departments of 6 medical institutions in Suzhou, and they were investigated by using a general information questionnaire, the International Physical Activity Questionnaire (IPAQ), sedentary behavior log, Pulmonary Functional Status and Dyspnea Questionnaire-modified (PFSDQ-M), Breathlessness Beliefs Questionnaire (BBQ), Hospital Anxiety and Depression Scale (HADS) and Social Support Rating Scale (SSRS). Results The average daily sedentary time of the stable COPD patients was (7.42±2.40) h, and the daily sedentary time of 159 patients (68.24%) was more than 6 hours. Logistic regression analysis showed that,whether understanding the harm of sedentary behavior, the situation of oxygen inhalation, COPD Assessment Test score and the subscale score of fear of activity in BBQ were the influencing factors of sedentary behavior (P<0.05 for all). Conclusion The sedentary time of stable COPD patients is long, and their sedentary behavior is common. Medical staff should take effective intervention to enhance patients′ physical activity, and improve their prognosis.