Objective To determine the test-retest reliability of swallowing function assessment by digital accelerometry for swallowing imaging (DASI^TM), specially for the elderly. Methods Thinty-three volunteers were assessed dry swallowing 4 times with DASI^TM, get the mean data of peak of swallowing (PS), onset of swallowing (OS) and duration of swallowing (DS) with the Software providing imaging and physiology measurements. Retest was performed in a week. Statistics using software SPSS 17.0 obtained the intraclass correlation coefficient (ICC) of AS, OS and DS. Results The ICC of AS and DS were 0.767-0.914 ( P< 0.01), had very good test-retest reliability. The all volunteers’ ICC of OS was 0.410(P>0.05), had medium test-retest reliability. The OS’ test-retest reliability in the elderly was poor. Conclusions DASI^TM has good test-retest reliability in swallowing assessment, it is non-invasive, portable, cheap, and feasible for most dysphagia patients.