Planetary gear reducers meet the miniaturization, precision, and efficiency requirements of high-end equipment, serving as core transmission components for Industry 4.0 and intelligent manufacturing. Future development will focus on **higher precision (≤0.5 arc minutes), higher torque density, lightweight (aluminum alloy/titanium alloy), and intelligentization (condition monitoring)**, continuously expanding their application depth in high-end fields such as humanoid robots, new energy vehicles,