Purpose The purpose of this study is to investigate the effect of chest expansion exercise and breathing training combined with POWERbreathe equipment on lung function and balance in stroke patients. Methods The subjects of this study were a total of 16 stroke patients, 8 in the experimental group and 8 in the control group. All groups received Bobath treatment for 30 minutes once, 5 days a week, for 6 weeks. The experimental group's breathing training included chest expansion exercise and POWERbreathe training simultaneously. The control group applied general breathing training. Breathing training for all groups was conducted for 20 minutes, 5 days a week, for 6 weeks. Pulmonary function tests were conducted by measuring FVC, FEV1, and FEV1/FVC, and balance was assessed using the Functional Reach Test(FRT). Result In the lung function test before and after the intervention of the experimental group and the control group, FVC, FEV1, and FEV1/FVC were significantly improved in the experimental group, and there were significant differences in FVC, FEV1/FVC in the comparison between groups, and in the FRT measurement of the balance test, the two groups All significantly increased, and there was no significant difference in comparison between groups. Conclusion Breathing training in stroke patients is effective in improving lung function and balance ability. However, breathing training combined with chest expansion exercise and POWERbreathe equipment is more effective in improving lung function and balance ability than general breathing training.