Abstract: Objective: With the rapid development of URT (urban rail transit), higher requirements are placed on the operation quality of URT vehicles. Reducing the unsprung mass, improving the small radius curve negotiation capability, minimizing wheelrail wear and reducing operational noise have become major research topics for URT vehicles. Method: Combining the compact structure, lightweight design, and excellent curve negotiation capabilities of the inboard axle box bogie, an inboard axle box bogie suitable for Chinese B2type metro clearance is developed. The design parameters, structural composition, and technical characteristics of the inboard axle box bogie for 120 km/h speed level are emphatically introduced. The strength of the bogie frame is calculated and verified, and the dynamics analysis and line validation of the train are conducted. Result & Conclusion: The inboard axle box bogie offers technical advantages such as lightweight construction and low wheelrail force, fully meeting the operational requirements of URT vehicles.