Bean grinding device of coffee machine

The utility model discloses a bean grinding device of a coffee machine, and relates to the technical field of coffee bean grinders. The grinding device comprises a grinding box and a box cover, the box cover is installed on the outer surface of the grinding box, a plurality of installation frames are welded to the inner surface of the grinding box, installation grooves are formed in the inner surfaces of the installation frames, installation blocks are embedded in the inner surfaces of the installation grooves, grinding discs are welded to the outer surfaces of the installation blocks, and installation sleeves are welded to the inner surface of the box cover. A rotating shaft is embedded in the inner surface of the mounting sleeve. According to the coffee bean grinding device, the grinding motor drives the power bevel gear to rotate, the rotating shaft is driven to rotate by means of meshing between the power bevel gear and the transmission bevel gear, so that the crushing rod is conveniently driven to rotate