Abstract: The turbine disk is recognized as one of the core components of an aero engine. Through research, it has been identified that in actual production, the contact between the working surface of the turbine disk slots and the slot teeth of the blade is not entirely flat, leading to stress concentration and exacerbated wear. In response to the issue of ripples observed on the working surface of the slots of the GH4133B turbine disk following precision broaching, a model for the distribution of the local geometric angles of the broach is established, alongside a mathematical model for the broaching force per unit area. The deformation law of the slots under the influence of the dynamic broaching force is analyzed through finite element simulation. It is demonstrated by the research results that the thickness of the slots, the disparity in stiffness on both sides, and the installation angle significantly affect the machining accuracy. Based on the simulation outcomes, targeted process optimization schemes are proposed to enhance broaching efficiency and accuracy, thereby laying a crucial process foundation for the manufacturing of turbine disks.