Objective:To explore the distribution pattern of TCM syndromes of diabetic foot gangrene (tendon gangrene), and to provide reference for TCM syndrome differentiation and its objectification and standardization of diabetic foot gangrene (tendon gangrene). Methods136 patients with diabetic foot gangrene (tendon gangrene) were included, a four-diagnostic-method information collection table for diabetic foot gangrene (tendon gangrene) and a database were established. Statistical methods such as factor analysis and cluster analysis, and syndrome element differentiation methodology were used to conduct TCM syndrome research.  Results:A total of 17 common factors were obtained by factor analysis, a cluster analysis was performed considering professional knowledge, and 4 valid TCM syndromes were obtained according to the method of syndrome element differentiation. The syndromes are the following in the descending order: syndrome of excessive dampness-heat and toxin, syndrome of blood vessel stasis and obstruction, syndrome of qi and blood deficiency and syndrome of toxic heat injuring yin.  Conclusion:The most commonly-seen syndrome of diabetic foot gangrene (tendon gangrene) is syndrome of excessive dampness-heat and toxin, with dampness-heat being the main syndrome element; followed by syndrome of blood vessel stasis and obstruction, syndrome of qi and blood deficiency and syndrome of toxic heat injuring yin.