Abstract: An experimental device of belt centralized control system was developed by use of AT89S52 single-chip microcomputer and(VB6.0) software development platform under background of design and application of belt centralized control system of coal mine.The experimental device has a friendly monitoring interface of upper computer,and the upper computer can communicate with the single-chip microcomputer by RS232C and real-timely monitor faults of belt deviation,over speed,temperature,tearing and others.The experimental device reproduces actual working environment and process of belt transport system of coal mine in laboratory,it not only can be applied in actual production,but can train students' innovation awareness and capacity through the secondary development.