At present, there are few researches on the somatosensory function of stroke patients, and the two-point discriminative test disc used in hospitals is primitive. This article discusses a quantitative test system for the sensory function of stroke patients, which makes up for the lack of digitization and modernization of the traditional two-point discrimination test in rehabilitation hospitals at this stage. Through the software and hardware design of the system, this system integrates multiple functions such as testing, electronic recording, chart analysis, etc. After field tests and comparative experiments in hospital, the results of quantitative test are almost the same as those of traditional test method, and the test time can be reduced about 90%. The system achieves such high accuracy and efficiency that it can be further popularized and applied.