The invention provides a milling machine, including a main machine provided rotatably with a milling drum, a tailgate mechanism arranged on the main machine. The tailgate mechanism comprises a tailgate and a feeding hole located on the tailgate, a discharge hole is provided with a movable feeding device which has at least two positions, and a discharging direction of the discharging hole is changed by the feeding device through a switch of the positions. According to the tailgate mechanism with feeding function, milling materials can be distributed in an appropriate position according to specific construction needs to ensure normal work of the milling machine.