At present, the application of collagen dressings in the field of wound repair has attracted wide attention. As a natural polymer with good biocompatibility and excellent biological activity, collagen has shown a good application prospect in the field of skin chronic wound dressings. In the past few years, with the continuous development of biotechnology and materials science, the research of collagen dressings has made remarkable progress. This article reviews the research progress of collagen dressing in the field of wound repair, focusing on its clinical application status, mechanism of action and preparation technology, and discusses the future development direction of collagen dressing.