Mothers who eat a normal diet usually do not have a lack of fat in their breastmilk. The causes of low fat in breastmilk need to be analyzed and treated. Fat is the largest source of energy in breastmilk. Low fat content in breastmilk may affect the growth and development of the breastfed baby if the breastmilk is insufficient for a long period of time. It is necessary to analyze the reasons for the low fat content in breast milk. If it is caused by insufficient nutrition in general, it is recommended that mothers can properly supplement some foods containing more fat and protein, such as pig’s trotters, pork rinds, lean meats, eggs, etc.; if it is due to the maternal gastrointestinal tract diseases and absorption problems, the corresponding treatment can be carried out for the underlying diseases. Maternity after childbirth should pay attention to supplement adequate nutrition, at the same time pay attention to the balance of food, in addition to the need to pay attention to protein and fat supplement, but also need to eat more green vegetables, fruits, grains and cereals.