In order to explore the anti-aging effect and mechanism of recombinant recombinant human-derived collagen (RHC), the aging mouse model was constructed through 300 mg/kg D-galactose intraperitoneal injection, and different doses of RHC were used to study the changes of hyaluronic acid, collagen, lipofuscin, hydroxyproline content, antioxidant enzyme activity, key genes and protein expression related to epidermal cell proliferation and differentiation and collagen synthesis. The results showed that compared with the aging model group (SLM), the intervention groups that was gavaged RHC had significantly less skin folds, higher collagen content (P