The invention provides a coffee machine capable of achieving full-automatic water feeding and bean grinding. The coffee machine comprises a water tank, a machine body, a water supplying assembly, a grinding assembly and a brewing assembly; a brewing chamber and a grinding chamber are at least arranged in the machine body, and the brewing assembly and the grinding assembly are correspondingly arranged in the brewing chamber and the grinding chamber respectively; the brewing assembly comprises a rotating part which is rotatably arranged, at least one brewing cavity is formed in the rotating part, and openings of the brewing cavities rotate in a circular ring-shaped track; the brewing assembly is at least provided with a brewing head opening and a discharge port, and a water outlet of the water supplying assembly and a powder outlet of the grinding assembly are communicated with the openings of the brewing cavities through the brewing head opening and the discharge port respectively; the openings of the brewing cavities rotate along with the rotating part to be cyclically and sequentially communicated with the discharge port and the brewing head opening; a liquid draining hole is formed in the portion, far away from the opening, of each brewing cavity, and the liquid draining holes are communicated with a coffee outlet; an included angle D is formed between the rotating C axial direction of the rotating part and the moving B axial direction of a brewing head. According to the bean grinding coffee machine, by rotatably arranging the rotating part, the feeding, brewing and discharging processes of the coffee machine can be automatically, continuously and cyclically conducted, and then the requirement for full automation is met.