Inclusion Criteria:  1.Idiopathic Parkinson's disease (PD), as diagnosed by a neurologist. 2.Item 3 of the New Freezing of Gait Questionnaire(NFOGQ) scored ≥1. 3.Age between 40 and 80 years old. 4.Mini-Mental State Examination score >24. 5.Ability to walk 30 meters independently. 6.Stable medication.  Exclusion Criteria:  1.Other neurological or psychiatric disorders. 2.Severe personality disorder.History of epilepsy, seizures or convulsions. 3.History of head injury or stroke. 4.Metal remains of the skull or inside the brain (outside the oral cavity). 5.Surgeries including metallic implants or known history of metal particles in the eye, pacemakers,hearing devices transplantation, or medical pumps. 6.Severe dyskinesia, termor, cognitive, visual or auditory impairment. 7.Patients who could not complete the follow-up.