Objective To observe the correlation between physical fatigue and motor function in patients with Parkinson's disease (PD). Methods The 36 patients (12 females, 22 males) with PD were elected from PD clinic in Beijing Hospital, and 18 health controls of age and gender matching were enrolled. The Parkinson Fatigue Scale (PFS), the timed get up and go test and the six-minute walk test were used to evaluate the disease progress, physical fatigue and motor function. The correlation between PFS score and motor function was analyzed. Results There were significant differences between patients with PD and healthy controls in PFS score, get up and Go performance time and the max six-minute walk distance (P＜0.05). In patients with PD, the PFS score was positively correlated with get up and go performance time (r= 0.82, P＜0. 01 ), and was negatively correlated with distance of six-minute walk (r= -0. 61, P＜0. 01). Conclusions Patients with PD show more fatigability and decreased motor function compared with healthy people of age and gender matching; The severity of physical fatigue symptom of patients with PD shows positive correlation with get up and go performance time, and negative correlation with the distance of six-minute walk.