In order to study and analyze the vehicle lane changing interaction behavior under the road traffic environment, and objectively to reflect the micro behavior characteristics and macro traffic flow operation law of vehicles. By analyzing the micro driving behavior of vehicle lane changing, the logit model is established to analyze quantitatively the decision-making process of driver lane changing behavior. Based on the "utility theory", the decision-making utility of driver is maximized. The actual traffic flow of Hangan Expressway in Qingdao is taken as the research background, and model related parameters are calibrated, the accuracy of hierarchical logit model is verified by further simulation.The research results can provide theoretical support and method basis for vehicle to vehicle interaction, vehicle road coordination and automatic driving system under the intelligent network environment.