Abstract: Compressive strength, density, water absorption and the range of applicable depth of three types of full ocean depth buoyancy materials included syntactic foam, glass floatation spheres, ceramic floatation spheres were introduced. The production methods of full ocean depth buoyancy materials were sketched and the development status of full ocean depth buoyancy materials at home and abroad was summarized. How to reduce the density of material as much as possible while satisfying the compressive strength that was the essential problem of fabricating high performance full ocean depth buoyancy materials was put forward.