Feeding device of grinding machine

The utility model relates to the field of micro drill machining, in particular to a feeding device of a grinding machine. The feeding device of the grinding machine comprises a machine body, and a base is arranged on one side of the machine body; the box body is provided with an insertion groove and a containing space, and the insertion groove is located in the wall face of the side, close to the base, of the box body; the first fixing assembly comprises a supporting piece and a connecting piece, and a first shaft rod is installed on the sides, close to each other, of the two ends of the connecting piece; one ends of the two first fixing pieces are fixedly connected to the box body, and a second shaft rod is further installed between the two third fixing pieces; one side of the limiting piece is connected with the first shaft rod in a sleeved mode, the other side of the limiting piece right faces the inserting groove, and the wall face, right facing the inserting groove, of the middle section of the limiting