［Objective］With the continuous development of urban rail transit and the ongoing expansion of metro lines, the service environment for metro vehicle bogies is becoming increasingly complex. This poses new challenges to the operational safety and reliability of bogies. Therefore, it is necessary to study the actual in-service performance of metro vehicle bogies under complex conditions.［Method］The vehicle bogies of a Shenzhen Metro line are selected as the research object and their long-term in-service performance study is carried out. Comprehensive line-tracking tests are conducted targeting test lines and test scenarios under various working conditions, with multiple rounds of testing performed within a single wheel reprofiling cycle. Data are systematically collected on wheel conditions, dynamics performance, structural strength, and vibration characteristics of metro vehicle bogies under real operation conditions. Trends for wheel radial runout distribution, wheel out-of-roundness characteristics, equivalent conicity, and rolling circle wear are obtained. Vibration acceleration test data of bogies are acquired by placing test points, and the dynamics performance evolution law of bogies is comprehensively analyzed in conjunction with the wheel condition data. Additionally, eight key dynamic stress measurement points are arranged on the bogie frame to observe changes in critical stress locations under the unloaded and the peak passenger load two operating conditions.［Result & Conclusion］Since wheel radial runout has the greatest impact on wheels, periodic monitoring of wheel radial runout should be strengthened. The weld joint at the motor suspension bracket is identified as a high-risk location, requiring regular monitoring and maintenance.