The recent research status of 3D braided composite technology and its application in the field of aerospace are introduced. Firstly, the classification, braiding techniques and mechanical properties of three-dimensional braided composite are introduced; Secondly, the analysis model and mechanical analysis method of three-dimensional braided composite in recent years are reviewed; Finally, the problems in the application of three-dimensional braided composites are discussed, and the advantages of three-dimensional braided materials and their possible improvement in structure and applicationfields are discussed.