The invention relates to a traditional Chinese medicine grinding device with a screening function, and the traditional Chinese medicine grinding device effectively solves the problem that grinded medicine powder is separated in real time by an existing grinding device in a grinding process. According to the technical scheme adopted by the invention, the traditional Chinese medicine grinding devicecomprises a medicine grinding slot, wherein a filter screen capable of shaking left and right is arranged on the bottom of the medicine grinding slot; a medicine grinding wheel is arranged in the medicine grinding slot; a U-shaped plate which is locked on the bottom of the medicine grinding slot, and can synchronously move left and right along with the medicine grinding wheel is arranged below the medicine grinding slot; the outer side of each side plate of the U-shaped plate is equipped with a ratchet wheel; a pawl strip which prevents each ratchet wheel from rotating clockwise is arranged below the corresponding ratchet wheel; the inner side of each ratchet wheel is coaxially fixed with a friction wheel; a winding wheel which is rotatably connected onto the U-shaped plate sleeves the outer side of each friction wheel; a rope is fixed and wound on each winding wheel; the other end of each rope is connected to the end part of a medicine grinding wheel mandrel at the same side; and theleft end of each medicine grinding slot is equipped with a reciprocating lead screw capable of driving each medicine grinding wheel to move left and right.