The traditional protection gears have the disadvantages of heavy weight and are difficult to deform. In recent years， the protection gears inspired by biological armor structures have been developed， which better solves the contradictory problem between protection performance and flexibility. This paper summaries the findings on multi-level structure and mechanical properties of biological armor， as well as the design and manufacture methods of biomimetic protection gears； and further discusses the chosen materials and structures， protection performance and mechanism， and application prospects of modern biomimetic scale-like protection gears. The main problems at the current stage are pointed out， and the future development directions of high-performance biomimetic flexible protection gears are prospected