Objective By the way of the Research of digital and quantitative four diagnostic features in traditional Chinese medicine for type 2 diabetes to promote the application of traditional Chinese medicine in diabetes treatment，intervention， prevention and control of its complications. Methods To select 35 T2DM patients randomly as the experimental group， while 33 healthy people as the control group. By applying the four diagnosis auxiliary apparatus to collect four clinical diagnosis information and summarizing the statistical analysis of the four diagnostic information at the same time. Results The pulse diagnosis results were showing that compare with the healthy group， the value of T2DM pulse wave conduction velocity and string and tightness were higher， and there was statistically significant differences between the two groups（P<0.05）， while the value of pulse power， pulse frequency and fluency， there was no significant difference（P>0.05）；The tongue diagnosis results were showing that compare with the healthy group， the ratio of T2DM red， crimson of tongue nature and yellow， thick and greasy of tongue coating were higher some patients have crack tongue. The results of smell diagnosis were showing that fire type constitution ratio is higher， controls water type constitution ratio is higher， water and fire was statistically significant difference（P<0.05）， wood type， soil type， metal type of physical distribution there was no significant difference（P>0.05）. Conclusion Compared with healthy people， four clinical features of patients with type 2 diabetes exists obvious difference. By applying four diagnostic and auxiliary apparatus diabetic and acquring patients’ important digital and quantitative four diagnostic information， helping to realize the standardization of TCM diagnosis of type 2 diabetes， and then by the way of the subjective and objective combined syndrome differentiation， to conduct evidence-based medicine of TCM and to intervene the progression type 2 diabetes. It is more advantageous to combine traditional Chinese and western medicine on the diagnosis and treatment to control the vicious incident vascular complications and blood vessels.