Objective To explore after brainstem stroke patients with dysphagia by modified balloon dilation of the clinical effect of treatment and before and after the treatment in patients with pharyngeal function change by swallowing angiog -raphy digital analysis method for analysis and evaluation .Methods 60 patients with dysphagia after collection of brainstem stroke in our hospital were randomly divided into two groups .Control group (30 cases) underwent routine dysphagia rehabili-tation training in the treatment , and the observation group of 30 cases in the control group on the basis of the treatment added with balloon dilatation for treatment .Comparative analysis of pharyngeal contraction rate ( PCR) and pharyngeal contraction time between two groups before and after treatment were assessed by swallowing and digital measurement .Results There was no significant differences in PCR between two groups of patients before treatment ( P>0.05 ) .Compared with before treat-ment, the two groups of patients after treatment with different food PCR were significantly improved , and the difference was statistically significant (P<0.05).The improvement degree of the observation group was more significant than the control group (P<0.05).There was no significant difference between the two groups of patients before treatment (P>0.05).Com-pared with before treatment and after treatment in two groups of patients with different swallowing food pharyngeal contraction duration were significantly improved , and the difference is statistically significant ( P<0.05 ) and to improve the degree of the observation group compared with the control group is more significant ( P<0.05 ) .Conclusion The digital analysis technology of swallowing angiography can effectively evaluate the changes of pharyngeal function in patients with dysphagia af -ter stroke.It is worth to be further popularized .