Fiber Metal Laminate (FML) is a lightweight material that combines the advantages of fiber-reinforced composites and metal laminates with good mechanical properties. It is extensively utilized in the transportation and aerospace sectors, especially as a structural component in the skins, wings, and tails of aircraft. However, under challenging service conditions, the interfacial properties and structure between the layers are crucial to load performance and, as such, require industrial applicability research. In FMLs, interlaminar failure drastically decreased mechanical properties, even to the point of catastrophic consequences for safety and the economy. People are put in danger when vital structural parts of airplanes and other manned vehicles fail or are destroyed. Therefore, it is essential to describe the interlaminar failure behavior of FMLs and provide preventative measures for these flaws. For the metal layers and fiber to form a strong bond, the surface treatment of the metal sheets is crucial. This review paper explores the various studies conducted by numerous groups that systematically discuss the effect of surface treatment on interlaminar behavior and other mechanical behavior. Readers can obtain research progress on the surface treatment method, and failure behavior of FMLs through this review article more efficiently.