4D printing technology is an innovative manufacturing method that adds the dimension of time to traditional 3D printing, enabling materials to respond to environmental stimuli (such as temperature, humidity, light, etc.) by changing shape, properties, or functionality. This study examines the fundamental principles of 4D printing in detail and explores its advantages and potential applications in the context of Unmanned Aerial Vehicles (UAVs). The foundation of 4D printing lies in the use of smart materials such as shape-memory polymers, self-healing composites, and hydrogels. These materials allow UAV components to dynamically adapt to flight conditions through pre-programmed responses. The study also comparatively discusses 4D printing techniques (FDM, SLA, DIW, SLM) and their suitability for UAV manufacturing. Additionally, current challenges such as material limitations, the complexity of multi-material printing, and high costs are addressed, and future research directions are highlighted. In conclusion, 4D printing technology holds revolutionary potential for improving UAV performance and durability. However, to fully realize this potential, advancements in material science, printing technologies, and design methods must continue.