Intervention Effect of High Definition Transcranial Alternating Current Stimulation (HD-tACS) on Depressive Disorder

Inclusion Criteria: * the patients were diagnosed by more than 2 psychiatrists and met the diagnostic criteria of DSM-5 for depression, and item 3 of the HAMD≥3. * the age ranged from 18 to 65 years old, and the length of education was more than 5 years. * the visual acuity or corrected visual acuity is normal, right-handed, can cooperate with the completion of various experimental tests. Exclusion Criteria: * accompanied by severe somatic diseases, such as severe heart, liver, renal insufficiency and so on. * accompanied by other neurological diseases, such as stroke, epilepsy and so on. pregnant and lactating women. * accompanied by other mental disorders, such as drug abuse, schizophrenia, schizophrenic affective