Abstract: Considering the problems existing in the quantitative loading station, such as low degree of automation and intelligence, high manual operation intensity, imprecise loading effect and so on, a precise loading system for fast quantitative loading station is designed in this paper. according to the composition and working principle of the fast quantitative loading station, the system studies the control technology including car number acquisition, quantitative warehouse valve control technology and coal chute control technology. Through the information collection and processing of different equipment and the control of different equipment, the fast quantitative loading of the station and accurate loading is completed by the programmable controller PLC. In view of the current quantitative loading station loading mode is backward, there is no residual coal detection system, loading is not accurate and so on. This paper designs a set of detection method of residual coal carbon in the car, mainly through two-bit lidar scanning the inner surface of the car to be loaded and generating point cloud data, through the point cloud data processing to get the three-dimensional image of the coal in the car, filtering the image to further get the quality of the residual coal in the car to achieve non-contact weighing. Finally, the key technology of fast quantitative loading station is verified in Baiyinhua Mengdong open-pit coal mine in Inner Mongolia. The research content of this paper provides a basis for the research and development of train fast quantitative loading system in open-pit mine.