To explore the therapeutic effect of transcranial direct current stimulation (tDCS) with different intensities in the treatment of swallowing disorder of patients with true bulbar paralysis. Methods: Forty-two patients with true bulbar palsy were enrolled and randomly divided into control group, low intensity group, and high intensity group, with 14 cases in each group. All cases were given routine swallowing rehabilitation training. Cases in high-intensity group were given 2 mA stimulation, cases in low-intensity group were given 1 mA stimulation, and those in control group were given sham stimulation, 20 min per time, 5 times per week and for 3 weeks. Before and after 3-week of treatment, the severity scale of dysphagia under fiberoptic endoscope (FEDSS), modified Mann swallowing ability assessment scale (MMASA) and surface electromyography (sEMG) data of three groups were got and analyzed. Results: After treatment, the FEDSS score of low and high intensity groups were lower than that of control group (P<0.05) and the FEDSS score of high intensity group was lower than that of low intensity group (P<0.05). After treatment, the MMASA score and sEMG of low and high intensity groups were higher than that of control group (P<0.05) and the MMASA score and sEMG of high intensity group was higher than that of low intensity group (P<0.05). Conclusion: tDCS electrical stimulation can improve swallowing disorder of patients with true bulbar paralysis, and the therapeutic effect of high-intensity is probably better than low-intensity.