The work aims to understand the local impact force and characteristics of collisions, so as to provide a the-oretical basis for product safety protection design, and analysis and evaluation of impact response. The local stiffness characteristics and overall structural effects of the collided flexible body were respectively characterized as the spring force-displacement relationship by abstracting common features of rigid-flexible collision. A two-degree-of-freedom rigid-flexible collision dynamics model of the system was established. The characteristics and different influencing factors of local impact force between rigid body and constrained flexible body were analyzed systematically with numerical methods. The law of influences of the main factors such as the initial collision velocity of the rigid body, the local stiffness characteristics and the overall structural effect of the flexible body impact on the characteristics such as time history, impulse, peak and pulse width of the local impact force were obtained. The understanding of the local impact force of rigid-flexible collision is deepened to provide the theoretical basis for the protective structure design.