Abstract: The paper put forward a design scheme of production management system of coal preparation plant based on ASP.NET, VB 2005 programming language and SQL Server 2005 database according to business flow of coal preparation plant and mainly introduced implementation methods of function modules and user interfaces of the system. The system uses B/S structure and includes function modules of user login, storehouse management, safety management, meticulous management and system maintenance with friendly interface and easy operation and maintenance.