Objective To research the correlation of tongue and laboratory parameters in type 2diabetes.Methods Totally5 930cases of type 2diabetes were collected.The tongue color

form of the tongue

sublingual network vessels

fur color and nature of the fur were described according to the tongue records.The ratio of each tongue and its correlation with fasting plasma glucose（FPG）

2hour postprandial blood glucose（2hPG）

glycosylated hemoglobin（HbA1c）

triglycerides（TG）

total cholesterol（TC）

the patient’s age（AGE）and body mass index（BMI）were analyzed.Results The common tongues of type 2diabetes were 42.12%red tongue and 30.90% dark red tongue

34.58%enlarged tongue and 31.40%tooth marks on the margins of the tongue

42.43% white tongue fur and 37.32% yellow tongue fur

30.09%thick tongue fur and 21.68%slimy tongue fur and 63.25% static sublingual network vessels

15.34% stagnant to static sublingual network vessels and15.06%stagnant sublingual network vessels.The thickness of tongue was positively correlated with FPG（P=0.001）and the correlation coefficient was 0.071.The scores of tongue thickness were positively correlated with 2hPG（P=0.046）and the correlation coefficient was 0.053.The scores of tongue color were positively correlated with TG（P =0.000）and the correlation coefficient was 0.155.The scores of tongue fur color were positively correlated with AGE（P=0.000）and the correlation coefficient was 0.087.The scores of tongue fur color were positively correlated with BMI（P=0.036）and the correlation coefficient was 0.084.The scores of tongue fur color were positively correlated with TG（P=0.035）and the correlation coefficient was 0.083.The scores of sublingual network vessels were positively correlated with AGE（P=0.000）and the correlation coefficient was 0.191.The scores of sublingual network vessels were negatively correlated with 2hPG（P=0.026）and the correlation coefficient was-0.075.Conclusion The common tongues of type 2diabetes are thick and slimy tongue fur

yellow tongue fur

enlarged tongue and static sublingual network vessels and have a certain positive correlation with laboratory parameters.