The invention relates to a screen for an ore machine. The screen comprises a bracket, a composite screen, tightening devices and an anti-fouling machine, and is characterized in that one side of the bracket is a flat plate, and the other side of the bracket is an arc, wherein the bracket is wrapped with the composite screen; the corresponding tightening devices are mounted at the two sides of the composite screen; the anti-fouling machine is arranged at the other side of the composite screen, and comprises a motor, a crank, a transmission rod, a scraping arm and an anti-fouling piece; the motor is connected with a transfer rod through the crank; and the transfer rod is connected with the scraping arm and the anti-fouling piece in sequence. The screen is simple in structure and not easy to block; and the anti-fouling machine is arranged at one side of the composite screen, so that the cleanness of the screen can be kept, and the ore separation can be realized more efficiently.