Abstract: It is a promising technique to provide inexpensive and high resolution display by exploiting the display cards and screens of computers in a cluster system. In this paper, a new interface is introduced, which combines the discrete display memories on each computer in a cluster system into a single one which can be accessed by various kinds of applications for multiscreen display. The synchronization mechanism for display supplied by this interface makes it suitable for parallel programming. Most important of all, programming of multi-screen display application with this interface will become simple and clear.