As a key system for ensuring flight safety and mission adaptability， the technological innovation of helicopter landing gear has always revolved around overall design， advanced materials and manufacturing processes， core capability enhancement， and operation and maintenance support capabilities. This paper first outlines the functional and performance enhancement design of helicopter landing gear through multi-physics matching and collaboration， and the logical transformation of landing gear ground dynamics technology from passive response to active prevention. Then， the paper reviews the current status of new landing gear technologies： Adaptive landing gear configurations achieve intelligent takeoff and landing in complex terrain from both control system and structural innovation perspectives； combined and kneeling configurations demonstrate that landing gear is no longer limited to a single form； new materials break through the bottlenecks of traditional materials， achieving integrated structural and functional design and lightweight design； health monitoring technology， relying on sensor networks， has initially formed state perception capabilities， but fault mechanism models still need to integrate multi-source data to improve diagnostic accuracy. Finally， it summarizes the current status of helicopter landing gear technology development and looks forward to future development directions.