Abstract:As an auxiliary examination method, ultrasound technology is essential in the field of obstetrics. It plays an important role in the diagnosis of pregnancy and prenatal examination. In recent years, ultrasound has been introduced into the field of labor process evaluation, which makes labor process monitoring diversified and personalized. The application of ultrasound technology in labor process evaluation can make labor process monitoring objective, repeatable, painless and avoid infection. At present, obstetricians and midwives pay more attention to the application of intrapartum ultrasound, strengthen the training of residents in the use of ultrasound during labor, and play a guiding role in the decision-making of clinical intervention. This paper summarizes the application of ultrasound in the labor process, and discusses the application of ultrasound in the labor process from the first, second and third labor processes, as well as other applications of ultrasound in the labor process, in order to make better development of ultrasound during labor, make more accurate and effective evaluation for women whose labor process is not smooth, and enable clinical workers to make the most effective diagnosis, avoid adverse pregnancy outcomes.