This clinical RCT study intends to combined different forms of multi-channel tDCS with the routine cognitive training process to treat patients with post-stroke cognitive dysfunction.

The therapeutic effects among single-channel tDCS group, multi-channel tDCS and pseudo-multichannel tDCS group will be compared. Brain magnetic resonance mechanism research will also be included to reveal the possible mechanism of multi-channel tDCS technology for PSCI brain network.

Thus, the efficacy and mechanism of multi-channel tDCS in post-stroke cognitive function rehabilitation will be researched both in the clinical and basic levels.

Inclusion Criteria:

• 18-60 year-old
• diagnosed cerebral apoplexy, meeting the diagnostic criteria of ICD-10
• cognitive function, perceptual function decline after stroke
• first onset and duration of 3-12 months
• right-handed
• MMSE ≤25
• MoCA ≤25
• sign informed consent voluntarily and comply with the study plan

Exclusion Criteria:

• NIHSS ≥21 points
• MoCA ≤18, or DRS-2 ≤ 124, or CES-D ≥ 16
• taking drugs that affect central nervous activity, such as nerve antagonists
• specific contraindication, such as electrode patch allergy, local skin injury or - - - - inflammation, and hyperalgesia in stimulated areas
• patients use implantable electronic devices (such as cardiac pacemakers) or have - metal implants such as stents that affect MRI examination
• patients with a previous history of epilepsy, mental illness or skull injury
• patients with dementia or obvious cognitive dysfunction before stroke
• patients with aphasia or dysarthria and cannot complete the scale evaluation
• pregnancy