Objective To investigate the valuation of cardiopulmonary exercise test(CPET) on the early COPD patients' rehabilitation.Methods 85 COPD patients were randomly divided into exercise rehabilitation group(n=45) and regular group(n=40).Patients in exercise rehabilitation group were accepted exercise rehabilitation method according to CPET data.Patients in regular group were accepted normal rehabilitation method.All patients were accepted CEPT.After 6 months,VO2 max,6-minute walk distance(6 minWD),FEV1/FVC and LVEF LPmax of patients were detected.Results The differences of FEV1/FVC and LVEF in both groups were not statistically significant(all P>0.05).Compared with the regular group,VO2 max,6-minMD and LPmax of patients in the exercise rehabilitation group became better(all P<0.05).Conclusions Exercise rehabilitation method with the guidance of CPET parameter can improve the cardiopulmonary functions of the early COPD patients