Abstract: In order to promote the intelligent development of mines and improve the automatic con⁃ trol level of crushing system in Anqing Copper Mine，the crushing system is upgraded to solve the prob⁃ lems of serious aging of components，high failure rate of operation and low automation of control system in the original crushing system.By using Siemens PLC + domestic signal module + coal safety protection sen⁃ sor，the automatic control of belt conveyor is realized. Through the upper computer configuration software ForceControl，the original crusher control，screening system and dust removal system are integrated. With the on-site intelligent video monitoring，the centralized control of the on-site centralized control room and the remote central control room is realized.The field application results show that the whole process of the modified crushing process has realized automatic production，and the solutions to the problems such as un⁃ stable operation of the voice broadcast system and long response time of RS-485 communication in the sys⁃ tem debugging are given，which improves the operation efficiency and automatic control level of the crush⁃ ing system.

Key words: control logic, voice broadcast, RS-485 communication, sensor, AI intelligent video