Abstract: With the development of data warehouse, the security problem is becoming more and more serious. On the one hand, the data warehouse itself needs enough openness. On the other hand, the data warehouse is of great value, which is required to strengthen the restriction of data access for the users. Opening and restriction, the contradiction between the two will seriously restrict the use of data warehouse. This article discussed the background of data warehouse security and the importance of security model, put forward a security model for the security of data warehouse. The security model could reduce security problems and provide a reference for the design of data warehouse to the enterprise.