 Transcranial direct current stimulation, TDCS, has been shown to improve motor function in stroke patients by altering the activity of specific regions of the brain. This study investigated the effects of TDCS on neural oscillation power and brain functional network, BFN, connectivity in stroke patients. The results suggest that TDCS may reduce the power of delta oscillations and weaken the global connectivity of delta band BFN, while increasing the power of alpha oscillations and improving the global and local connectivity of alpha band BFN. These findings imply that one of the neurophysiological mechanisms of TDCS treatment in stroke patients may be the modulation of the power of delta and alpha oscillations, as well as the improvement of the connectivity of delta and alpha oscillation networks. This article was authored by Meng Meng Lu, Guizhi Su, Hong Li Yu, and others.