The invention discloses a method for constructing a chronic ulcer model of diabetic mice, which comprises the following steps: S1, selecting SPF (
Specific Pathogen Free)-grade male C57BL / 6 mice with the age of 6-8 weeks and the weight of 18-20g, and adaptively feeding for 5 days in an SPF-grade environment under the condition that the illumination time is 12 hours and no illumination is 12 hours; s2, fasting the SPF-grade C57BL / 6 mouse, injecting
streptozotocin into the
abdominal cavity, feeding for 3 days in an SPF-grade environment, and detecting fasting blood glucose; s3,
hydrocortisone is injected into the SPF-grade C57BL / 6 mice in the step S2 for continuous 3 days, first
anesthesia and wound making are carried out, and after the mice are fed in the SPF-grade environment for 1 week, second
anesthesia and wound making are carried out; s4, blood is collected in a
tail cutting mode, blood
glucose detection is conducted on the SPF-level C57BL / 6 mouse, and when the fasting blood glucose of the mouse is larger than or equal to 11.1 mmol / L and the wound is delayed and not healed for two weeks after secondary wound making, it is judged that the
diabetic mouse chronic ulcer model is successfully constructed. The
traditional Chinese medicine composition can reproduce a chronic ulcer formation mechanism of a
diabetic patient; and an ideal model is provided for studying
chronic wound healing disorders by simulating clinical characteristics of repeated and unhealed ulcers.