Purpose This study aimed to investigate the effects of smart insolebased ground reaction forcebiofeedback training on muscle strength, balance in patients with stroke. Methods Twentyeight patients with post stroke hemiplegia were randomly assigned to an experimental group or a control group. The experimental group received smart insolebased ground reaction forcebiofeedback training, while the control group performed conventional physical therapy. Both interventions were conducted for 30 minutes per session, three times per week for six weeks. Muscle strength and balancerelated functional outcomes were assessed before and after the intervention. Results After the intervention, significant improvements in muscle strength and balance were observed in the experimental group compared to the control group. Significant increases in lower extremity muscle strength were identified in the paretic hip flexors, hip extensors, knee extensors, ankle dorsiflexors, and ankle plantar flexors, as well as in the nonparetic hip flexors and knee extensors(p<.05). Significant improvements in balance were also found in the weight distribution symmetry index, pareticside heel weightbearing ratio, limits of stability, and Berg Balance Scale scores(p<.05). Conclusion smart insolebased ground reaction forcebiofeedback training was effective in improving muscle strength and balance in patients with stroke