1.Align the barrel of the lancing device with the target, and the target tissue is sucked into the barrel under negative pressure pumping; the method of repeatedly pumping the barrel can be taken to make more and more tissue sucked in. 2, observe the negative pressure table pointer, when the negative pressure value reaches -0.08MPa to -0.1MPa, turn the winding wheel a full circle (i.e. 360 degrees, marked by the red line on the winding wheel), at this time the rubber ring automatically released, and the target tissue tied. 3.Turn on the negative pressure release switch to release the ligated tissue (about the size of the forefinger), and proceed to the next part of the ligature in the same way. 4.Note that when turning the winding wheel to launch the rubber ring, each time must turn a full circle that is 360 degrees, not more and not less, otherwise it will lead to the rubber ring entangled with each other. 5.After the rubber ring is tied around the hemorrhoid tissue, inject 2~3ml of “hypertonic saline + lidocaine mixture” or “anti-hemorrhoid injection” into the ligated tissue ball; after the injection, the tissue ball is obviously swollen and white (at this time, the rubber ring is tied more tightly and slips off). The possibility of slippage is very small, and the incidence of postoperative bleeding is almost zero). The method of preparing “hypertonic saline + lidocaine mixture”: take 10 ml of 10% hypertonic saline; then take 10 nl of 2% lidocaine and mix the two (the function of hypertonic saline is to promote dehydration and shrinkage of the hemorrhoid tissue; the function of lidocaine is to reduce the postoperative sensation of swelling and urgency).