Abstract: Diesel vehicle emissions are one of the important sources of air pollution in China. At present, there is still a lack of effective and fast monitoring method for real-world driving emissions, which makes emission supervision very difficult. In response to the above problems, a comprehensive management and control platform for remote monitoring of diesel vehicles has been established. The platform takes vehicle On-board Diagnostic System (OBD) upload data and company access control data as the core, integrates annual inspections, road inspections, remote emission sensing, gas station and other information to monitor real-time vehicle emissions, screen and analyze the causes of high-emission vehicles, inspect and evaluate the implementation of company vehicle control policies, and analyze mobile source emission reduction effects. The platform was applied to the supervision of diesel vehicles in Tangshan City, and the results showed that: (1) 46 key companies in Tangshan City during the autumn/winter and heavy pollution emergency response periods reached an average of 65% or more of transportation control effect. (2) OBD data analysis showed that 76% of the vehicle mileage was inside the city, and the main logistics channels showed the characteristics of 'two vertical and four horizontal' routes. High-emission vehicles mainly emitted high emissions under medium and high speed and high torque conditions. (3) In autumn and winter, the total traffic flow of the 46 key companies dropped sharply by 15.9% and 33.7%, respectively. This platform can monitor and evaluate the vehicle control of companies in autumn/winter and the operation and emission status of heavy diesel trucks, providing support for the dynamic and precise control of heavy diesel vehicles in the region.