General milling machine is composed of engine, frame, milling rotor, milling depth adjusting device, hydraulic components, aggregate conveying device, steering system and braking system.

The milling rotor is the main working part of a milling machine. It consists of a milling rotor shaft, a tool holder and a cutter head, etc., which directly contacts the road surface and works with its high-speed rotating milling cutter to achieve milling. The milling machine is equipped with an automatic leveling device, using the milling rotor side cover as the milling reference surface, and controlling two positioning hydraulic cylinders to keep the given milling depth constant;

The hydraulic system is used to drive the milling rotor to rotate, the whole machine walks, and auxiliary equipment work. Generally, it is a closed hydraulic system with multiple pumps independent of each other, which does not interfere with each other and has high reliability during work;

Some milling machines are equipped with a tilt adjuster to control the inclination of the rotor as required. Generally, large milling machines have a aggregate conveying device composed of a conveyor belt and a collector, which can concentrate the milled bulk material and combine it. Transfer to a random walking truck, the height of the conveying arm can be adjusted and swing left and right to adjust the unloading position.

When the specifications and models of the milling machine are different, the structure and arrangement are slightly different, but the basic working principle is the same or similar. The power transmission route of the milling machine: engine → hydraulic pump → hydraulic motor, hydraulic cylinder → working device.