Fatty liver can usually be detected during ultrasound as part of a physical examination. Fatty liver is a condition in which there are excessive fat particles in the liver cells, resulting in pathological changes in some of the liver cells. In the early stage of fatty liver, since the condition is mild and the liver has a strong compensatory ability, there are usually no obvious symptoms, and it can be detected by ultrasound during the physical examination. In mild fatty liver, ultrasound shows that the anterior echo is enhanced and the posterior echo attenuation is not obvious, and the tubular structure in the liver can be recognized; in moderate fatty liver, the echo enhancement is more obvious on the basis of the former, and the tubular structure in the liver starts to appear blurring but is still recognizable; in severe fatty liver, the anterior echo is obviously enhanced, but the posterior echo is obviously attenuated or even echo-less, and the tubular structure in the liver is blurring, and this can be used as reference basis for the physician to diagnose fatty liver. It can be used as a reference for physicians to diagnose fatty liver.