<p>Superhydrophobic materials exhibit great potential in industrial fields, but the issue of insufficient mechanical durability limits their large-scale production and application. The superhydrophobic properties of self-similar structural materials permeate the entire volume, which can fundamentally overcome the deficiency of poor durability in traditional materials. This review summarizes the research progress in such materials. Starting from the basic theory of hydrophobicity, it explains the design elements of self-similar superhydrophobic materials and analyzes the principles, applicability, and limitations of mainstream preparation techniques such as hot pressing, 3D printing, spraying, dip coating, and sol–gel method. Subsequently, the rese arch status and performance characteristics of bulk materials and coating materials are reviewed according to the material systems. Finally, the development trends of self-similar superhydrophobic materials in terms of multi-functional integration and green recyclability are analyzed, the main bottlenecks in current research are summarized, and prospects for future research directions are proposed. This review can provide references for the preparation of self-similar volumetric superhydrophobic materials and facilitate their promotion and application in practical industrial scenarios.</p>