Abstract: The paper introduced composition,communication principle and implementation and design of key parts of a monitoring system of hydraulic support test-bed based on VB and PLC.The system uses IPC-610-H industrial computer and S7-200 PLC to build up control systems of upper computer and lower computer.The development platform of the upper computer selects VB6.0 which MSComn control is used to realize communication between the upper computer and the lower computer.ODBC database access technology is used to enhance user-oriented data management function and realize storage and query of experiment data.The lower computer realizes functions of process control and data collection of hydraulic support test.The test result and actual application showed that the system can realize automatic control of hydraulic support test-bed and ensure each test for hydraulic support to be finished reliably,and can complete real-time monitoring for loading process of internal circulation of hydraulic support.