The invention discloses a full internal suturing device for tissue repairing, which can simply and rapidly achieve full internal suturing of injured tissues. The full internal suturing device includes7 parts comprising a first anchoring nail, a second anchoring nail, a suturing thread, an inner needle, an outer needle, a depth limiting pipe, and a handle; the handle includes a plurality of partssuch as a pushing rod; according to the full internal suturing device, the first anchoring nail, the second anchoring nail, and the suturing thread are pre-embedded in the outer needle, the outer needle carrying with the first anchoring nail, the second anchoring nail, and the suturing thread enters an interior of a tissue, and the depth limiting pipe can limit the depth that the outer needle is inserted into the tissue; the size of the anchoring nails is small, damage to a tissue surface due to the anchoring nails can be reduced during puncturing; the anchoring nails are fixedly positioned ina pipe cavity of the outer needle, and the risk that the anchoring nails are released during puncturing can be lowered; a doctor can position a suturing position twice; the center of the handle is ofa symmetrical structure, a 360-degree pushing operation can be achieved, and clinic operation of medical workers is facilitated.