Against the backdrop of a significant increase in highway traffic during holidays, the demand for electric vehicle charging is showing a concentrated and explosive trend, and service area electricity prices have become a key factor affecting charging behavior. This study focuses on holiday periods and analyzes the correlation mechanism between electricity prices in highway service areas and electric vehicle charging behavior. By collecting charging data during typical holidays and combining it with the fluctuation period of electricity prices, this study analyzes the relationship between charging load and user behavior characteristics, and explores the impact of time of use electricity prices on the average queuing time in service areas. The research provides theoretical basis for optimizing the allocation of charging resources during holidays and formulating time of use electricity pricing strategies, which has practical reference value for alleviating the pressure of high-speed charging during holidays and improving the service efficiency of charging stations.