Abstract: In order to quickly recheck the diameter of train bogies, a system of quick rechecking of bogie diameters is constructed. The dynamic measurement theory, coordinate system calibration and other key algorithms of the reinspection system are studied. On the basis of this, a fast rechecking system of train bogie diameters GUI is built. Firstly, the design of dynamic measurement system is introduced according to the characteristics of train bogie. Then, coordinate transformation is used to change the coordinates of the obtained point cloud data. Then, the relative measurement algorithm is used to realize the fast calculation of the train bogie diameter. Finally, a fast rechecking systam of train bogie diameters GUI is built to meet the needs of the enterprise. The experimental results show that the measuring accuracy of the system based on dynamic measurement is ±0.1 mm. To meet the needs of the enterprise for the rapid re-examination of bogie diameter.