Current adjustment research is mainly focused on the existing railway or long-distance passenger dedicated line and less focused on the intercity passenger dedicated line. The latter is different from the existing railway or long-distance passenger dedicated line in terms of traveling distance and organization. This determines their different operation adjustment target and principles. Based on concise analysis of the intercity passenger dedicated line's features, this paper proposes the operation adjustment thought, considering the adjustment target according to the type of train. The paper analyzes adjustment principles under this adjustment target, lists possible adjustment measures, proposes the evaluation of the adjustment measures using a simulating platform, and presents the platform's work flow.