Acute kidney injury biomarkers include biomarkers reflecting glomerular filtration function markers, biomarkers of tubular function. For example, common creatinine, cystatin C, serum retinol-binding protein, neutrophil gelatinase-associated lipid-transporting protein and so on. 1. Markers reflecting glomerular filtration function: such as serum creatinine, urea nitrogen, cystatin C, β2-microglobulin, asymmetric dimethylarginine and symmetric dimethylarginine, fibroblast growth factor-23. 2. Biomarkers of renal tubular injury: serum retinol-binding protein, neutrophil gelatinase-associated lipid-transporting protein, renal injury molecule-1, urinary regulatory protein, hepatic-type fatty acid-binding protein, interleukin-18, and N-acetyl-β-D-aminoglucosidase. These biomarkers of renal injury can help to improve the diagnosis of acute kidney injury and reflect the development of acute kidney injury more accurately, so it is recommended to follow the doctor’s instructions to improve the relevant examination and treatment.