Some degree of localized hypoxia can cause varying degrees of cellular damage in tissues. Oxygen-releasing biomaterials can sustainably provide oxygen to transplanted cells. In recent years，extensive research efforts have been dedicated to developing more pratical oxygen-releasing biomaterials and systems to enhance oxygen delivery in vivo and ensure effective oxygen supply to implanted tissues. Based on the form of oxygen provision，these materials can be calssified into oxygen-carrying materials and oxygen-producing materials. The former deliver therapeutic oxygenation by binding oxygen molecules under specific conditions，while the latter incorporate oxygen source materials into polymers，achieving oxygen release through in vivo hydrolysis. This paper summarizes the current development of oxygen-carrying materials and oxygen-producing materials，including oxygen source supply，loading materials， and controlled release. It discusses practical application of oxygen-releasing biomaterials for oxygen delivery and various strategies for controlled release.