Injection lipolysis refers to the direct injection of pharmaceutical ingredients into the subcutaneous fat layer of human body in the form of injection to dissolve fat. Drugs can stimulate the increase of lipase in local fat cells, and then stimulate the activation of protein, so that the intracellular deoxynucleoside triphosphate is converted into deoxynucleotide, which promotes the activation of fat, decomposes it into fine state, and is excreted from the lymphatic system through the metabolism of the body. Clinically, liposuction injection is regarded as another continuation and expansion of liposuction surgery, which is suitable for small-scale local body shaping, but not for obese people to lose weight.