Milling tool for modeling composite bricks

Disclosed is a milling tool for modeling composite bricks. Bearings are arranged at two ends of a lead screw, bearing blocks are fixed by bracing wires and fixing piles, a nut and a rocking handle are arranged on the lead screw, the nut is connected with a motor and a milling cutter by a milling arm, an expansion apparatus is mounted between the milling arm and the milling cutter, an upper nut is further mounted on the lead screw and connected with the milling arm by a pull rod, a triangular structure is composed of the lead screw, the milling arm and the pull rod, and the expansion apparatus comprises an adjusting rod and an adjusting bolt. A milling tool with larger dimension can be manufactured, and the milling tool is simple in structure, low in manufacture cost and suitable for processing workpieces with larger dimensions, such as carving of large-size wall paintings or sculptures.