To explore the effects of motor-cognitive dual-task training on cognitive and motor function in stroke patients with hemiplegia. Methods: A total of 26 stroke patients with hemiplegia were collected, randomly divide them into motor-cognitive dual-task training (MCDT) group and mixed motor and cognitive task training (MixT) group, with 13 cases in each group. The MCDT group performs calculation tasks while exercising, while the MixT group first performs exercise training and then performs calculation tasks, each for 40 minutes, 5 times a week, for 4 weeks. Two groups of patients were evaluated using the Montreal Cognitive Assessment (MoCA), Timed up and Go (TUG), Multi-Directional Reach Test (MDRT), various gait parameters, and the Fugl-Meyer assessment scale for lower extremity (FMA-LE) before and after 4 weeks of intervention. Results: Before treatment, no statistically significant variations were observed in MoCA, TUG, MDRT, gait parameters, and FMA-LE between the two groups of patients (P>0.05). After 4 weeks of training, the MoCA, TUG, MDRT results, gait parameters, and FMA-LE scores of the MCDT and MixT groups were significantly improved compared to before training (P<0.05). At the same time, the differences in various indicators before and after training in the MCDT group were significantly improved compared to the MixT group (P<0.05). Conclusion: The motor-cognitive dual task training can effectively improve the cognitive and motor functions of stroke patients with hemiplegia.