Abstract: In order to study the impact of congestion pricing policy on traffic flow which is composed of travelers with different rational degree, congestion pricing policy of day-to-day route choice evolution model was introduced and a model to study the behavior of the day-to-day route choice of travelers under the condition of congestion pricing was established. The effects of congestion pricing policy of day-to-day dynamic evolution were discussed by a network consisting of two paths. A numerical experiment was made to analyzed evolution characteristics of the network traffic flow under congestion pricing. It shows that the congestion pricing policy has a certain effect on the evolution result and average travel time. In addition, the value of time and the degree of rationality affect the effect of the implementation of congestion pricing policy.