Abstract: Allthe 11 coal preparation plants of Shendong Coal Group Washing Center adopt the fast loading system with the annual loading capacity about 200 million tons. The rapid loading system has high loading efficiency,but the degree of automation is relatively low,the workload is large,and the waste of coal caused by subjective factors is serious,which affects the speed and accuracy of loading. In view of the above problems,the original rapid loading system was upgraded through the principle of programmable control technology and the application of sensors,and a new automatic loading system was developed. The specific measures were to add radar speed sensor and photoelectric sensor at a certain position of the loading station,the real-time loading speed of the train and the running position of the train were detected,respectively,and the programmable control technology was used to automatically adjust the opening time of the coal loading system point,so as to achieve fully automatic loading. Through the above technical measures,the loading accuracy of the loading system has been increased to over 99%,which is adapted to the automatic loading of different models. 80% of the labor of the loader is released by application of the fully automatic loading system,which reduces the loading cost of the coal preparation plant and saves about 15 million yuan/a of the economic losses caused by the problems such as maintenance costs,labor costs,overload and unbalanced load and labor loading quality caused by the collision between the loading chute and the vehicle. The accuracy of loading quantity control is improved,and the problem of poor loading quality,super and partial load caused by irregular operation is eliminated,and the stability and safety of the system are ensured.