Permafrost is distributed widely in our country.Although pile foundation is the main foundation form for large bridges in frozen zones,few studies have been conducted regarding the dynamic characteristics of pile foundation construction in permafrost.An improved nonlinear analytical model for frozen soil-pile dynamic interaction was developed on the basis of model test results of the dynamic characteristics of pile foundations in various subzero temperature soils under lateral dynamic loads and an analytical model of pile-soil-structure interaction with the dynamic beam on nonlinear Winkler foundation model. This improved analytical model simulates the nonlinear lateral pressure effect of the frozen soil around the pile with an improved bidirectional compression-only multi-yield spring. Vertical friction effects between the frozen soil and pile, extrusion and separation effects of frozen soil under pile tips, and damping effects of the far-field soil on the dynamic characteristics of pile foundations are also considered in this analytical model. The parameters of the bidirectional tensionless multi-section yield spring are determined by the nonlinear p-y relationship of frozen soil. The p-y relationship whose parameters were based on the results of the indoor frozen soil compression test was simulated by the combination of a cubic function and a constant function. Displacement-force response of the pile head and pile shaft responses to bending moments at different depths under dynamic forces were very similar to the model test results. Results indicate that the improved analytical model is potentially helpful during the analysis of frozen soil-pile dynamic interactions.