Objective:To analyze the characteristics of sleep disorders in patients with Parkinson disease (PD) and to explore the relationship between respiratory events and rapid eye movement sleep with hypotonia.Methods:Thirty-nine PD patients compared with 75 controls matched with gender, age and body mass index(BMI) were collected in the Dalian Municipal Central Hospital from January 1, 2019 to September 31, 2019. Both groups underwent polysomnography monitoring. The characteristics of sleep disorders were analyzed and discussed.Results:Apnea and hypopnea index (AHI) during total sleep, AHI during non-rapid eye movement(NREM) sleep, AHI during rapid eye movement (REM) sleep, obstructive apnea index, mixed apnea index, central apnea index, total apnea index, hypopnea index, the time with pulse oximetry <90% and oxygen desaturation index in the PD group were lower than those in the control group: 3.70(0.80, 20.00) /h vs. 17.30(7.30, 28.20)/h, 2.30(0.70, 13.90)/h vs. 15.20(4.90, 27.50)/h, 2.30(0.00, 29.80)/h vs. 16.90(5.70, 39.50)/h, 0.30(0.00, 5.10)/h vs. 3.10(0.50, 7.80)/h, 0.00(0.00, 0.20)/h vs. 0.20(0.00, 0.60)/h, 0.00(0.00, 0.30)/h vs. 0.30(0.00, 0.80)/h, 0.70(0.00, 6.00)/h vs. 3.90(0.80, 10.70)/h, 1.70(0.50, 8.90)/h vs. 8.70(2.70, 14.90)/h, 0.00(0.00, 0.40)min vs. 0.20(0.00, 1.70)min, 4.10(1.10, 18.40)% vs. 16.50(9.30, 30.80)%, and the differences were statistically significant ( P<0.05). The mean pulse oximetry and minimum pulse oximetry in the PD group were higher than those in the control group: 96.00(95.00, 97.00)% vs. 95.00(94.00, 96.00)%, 89.00(82.00, 91.00)% vs. 85.00(81.00, 89.00)%, and the differences were statistically significant ( P<0.05). PD group was divided into PD with RSWA group (PD + RSWA) and PD without RSWA group (PD-RSWA) according to whether there was atonia or not. AHI during REM sleep in the PD+RSWA group was lower than that in the PD-RSWA group: 0.00(0.00, 5.40)/h vs. 5.75(0.52, 34.57)/h, and the difference was statistically significant ( P<0.05). Conclusions:PD has a protective effect on nocturnal respiratory events, which may be due to the increased muscle tone of upper airway.