Objective In the past, ultrasound was mainly used to determine whether the scar uterus can be delivered through vagina. In this paper, this paper uses the finite element method to analyze the relationship between scar uterine stress and scar thickness and position., and then choose the delivery method. Methods First, SOLIDWORKS was used to establish a three-dimensional model of the full-term uterus, and then the intrauterine pressure, scar thickness and position were set in ANSYS software to calculate the uterine force. Results During the contraction process, the maximum stress is located in the uterine scar; 3mm is used as the thickness limit of the lower uterine body. If the thickness is less than 3mm, cesarean section should be selected immediately. Otherwise, transvaginal delivery can be selected. When the scar thickness is 3.0mm The maximum stress experienced by the uterus decreases first and then increases as the distance from the uterine floor increases. The stress at the uterine scar is the smallest when the distance from the uterine floor is 295mm; when the scar is 285-305mm from the uterine floor, the ultimate stress on the scar is less With regard to its tensile strength, it is safer to choose a natural product. Conclusion Based on ANSYS finite element analysis, a new method is used to study the early warning of scar uterine rupture. The analysis results are consistent with clinical data, and provide analysis methods and theoretical guidance for the choice of delivery methods.