There is no postpartum placental clothing for dairy cows. The treatment methods include drug therapy and surgical stripping. Surgical stripping works quickly. Strict aseptic procedures are generally not associated with sequelae. However, if disinfection is not strict and the operation is rough, a new disease will be added to the diseased cows. Mild fever and uterine inflammation will occur, and severe cases will produce sepsis after production. Therefore, the following taboos are given to the placenta who do not have to perform a stripping operation on the cows. First, avoid disinfection is not strict. The 0.2% potassium permanganate solution was used to sterilize the bull vulva and remove the contaminated blood and feces. This work must be carried out after the enema is removed from the rectum and the exposed fetuses should also be rinsed with disinfectant. The operator's arm was immersed in 0.1% potassium permanganate solution before peeling. If disinfection is not strictly bringing bacteria into the uterine cavity, endometritis will occur, and severe sepsis will occur after production. Second, avoid stripping prematurely. Prematurely, the placental detachment is very tight because the cotyledon and the mother's uterine cervix adhere, and the detachment will make the cow seriously bleeding. The pain will make the sick cow extremely uneasy, further causing the difficulty of delamination. Postpartum placental clothes should not be dislodged 12 hours before delivery; the best time is 13-15 hours in summer and 24 hours in winter is the best time for dissection. Third, avoid stripping too late. For example, if the cow's placental coat is left for more than 24 hours, it will be peeled off too late. Due to the embolization of the placenta in the uterus, the sub-film becomes very thin and difficult to peel; because of the long-term infection, the anaerobic bacteria can easily cause the emphysema in the sub-membrane, making the stripping more effective. Difficult to proceed. Late use of the stripping technique is most likely to result in a lack of peeling, which in turn causes inflammation of the endometrium and prolongs the estrus period. Fourth, avoid stripping is not clean. Unclear delamination can easily lead to metritis and puerperal fever; it is often seen in premature or late delamination. It is also seen in early pregnancy or in the hands of an operator who does not understand the structure of the uterus of bovine uterus. It is also prone to occur in feral cows. It will not be stripped. Preservation of the placenta occurs mostly in the gestational age. Larger cows have shorter arms and are less likely to touch deeper gestational angles. Also occurred in the non-operational procedures, first peeled off the depths of the placenta to cover the nearby palace, and to cut off the part of the cotyledon to retain part of the palace sulcus on the placenta. Emphysema occurs in the placenta, or corruption often causes dissection. Fifth, avoid washing after surgery. Some surgeons advocate washing the uterus after surgery, I do not advocate postoperative washing, because after the separation of the placenta is the most likely to be infected with pathogenic cervix, and then a uterus in a slow state is difficult to guide the rinse, potassium permanganate concentration Too high can damage the endometrium, so washing is not the best strategy, but it should be injected to promote uterine contractions, such as pituitrin. 6. Avoid uterus dosing after stripping. Due to peeling off of the body and fecal contamination, even if the multi-irrigation disinfectant will still bring pathogens into the uterus, it is advocated that the uterus should be injected with 100 oxytetracycline tablets or injected into Gongdekang after the operation, and it will take 2 to 3 days before being injected. The second time, the dose is the same as before. This can inhibit and kill pathogens and keep cows healthy.