【Purpose】To depict the trajectory characteristics of pedestrians at crosswalks in signal-free sections and deeply analyze their crossing behavior mechanisms, 【Method】this paper constructs a pedestrian crossing model based on a decision-execution framework. At the decision-making level, considering the differences in pedestrian crossing behaviors inside and outside the crosswalk, a binary Logistic regression model is adopted to establish the crossing decision models for both inside and outside the crosswalk to identify key influencing factors. At the execution level, given the limitations of traditional social force models in describing pedestrian crossing behaviors, pedestrian active overtaking force and crosswalk force are introduced to optimize the microscopic movement model of pedestrians. The validity of the model is verified through the MATLAB platform, and the trajectory distribution of pedestrians crossing is analyzed in combination with field measurement data. 【Result】show that compared with the decision model for the crosswalk interior, looking at mobile phones and the presence of non-motorized vehicles crossing have a significant impact on the decision-making results outside the crosswalk, while the improved social force model can better simulate the trajectory changes of pedestrians crossing. 【Conclusion】The pedestrian crossing deci-sion-execution model proposed in this paper can effectively identify key factors affecting pedestrian safety, providing theoretical support for traffic safety optimization and pedestrian facility planning in signal-free sections.