Inclusion Criteria:  idiopathic PD according to the United Kingdom PD Society Brain Bank Clinical Diagnostic Criteria.  Exclusion Criteria:  (1) Parkinsonian syndromes;(2) with severe lung disease, severe liver insufficiency and cardiac insufficiency; (3) Kubota water drinking test grade ≥3; (4) have had or combined other diseases that affect swallowing function; (5) Nasal feeding, gastric reflux or gastrostomy; (6) Mental disorders Or patients with low intelligence and cognitive function, unable to understand and cooperate with the examination.