Child grading refers to a quantitative scoring grading of liver reserve function that was proposed by Child in 1964, which was used to assess liver reserve function. It uses five indicators for scoring, namely bilirubin level, serum albumin level, prothrombin time, and ascites, which are scored as one, two, and three points according to the degree of mild, moderate, and severe, respectively, and the scores of these five indicators are summed to obtain a total score. The total score is then divided into grade A, B and C, with grade A being mild and grade C being the most severe, i.e., the worst liver reserve function. Based on this grading, the clinical surgeon can determine whether the patient’s liver can withstand the surgical blow and how much it can withstand, and the waiting list for liver transplantation abroad is based on the grading level.