The gantry milling machine consists of a portal frame, a bed worktable and an electrical control system.

The portal frame consists of columns and top beams, with beams in the middle. The cross beam can move up and down along the two column guide rails. There are 1 to 2 milling heads with vertical spindles on the beam, which can move laterally along the beam guide rail. A milling head with a horizontal spindle can also be installed on the two columns, which can move up and down along the column guide rails. These milling heads can machine several surfaces simultaneously. Each milling head has an independent motor (power up to 150 kilowatts), speed change mechanism, operating mechanism and spindle components.

The horizontal long bed is equipped with a movable worktable and is covered with a protective cover. During processing, the workpiece is installed on the workbench and undergoes longitudinal feed movement.