Digestive tract biopsy device

The utility model discloses a digestive tract biopsy device which comprises an outer air sac, a spatula and a three-way tube. An inner air sac is further arranged in the outer air sac, an inflating tube is disposed on the outer air sac, two cavities are arranged in the inflating tube, one cavity is communicated with the outer air sac and the spatula while the other cavity is communicated with the inner air sac, the inflating tube is connected with the three-way tube in an inserted manner, and the inner air sac, the outer air sac, the spatula and the inflating tube are integrally formed when manufactured. The three-way tube is provided with an outer air sac inflating ball and an inner air sac inflating ball, and the outer air sac inflating ball, the inner air sac inflating ball and the three-way tube are connected in an inserted manner. A plurality of fluffs are further arranged on the outer wall of the outer air sac and the outer wall of the spatula, and the inner air sac, the outer air sac and the spatula ar