Effective cost control in the investment and design phases of highway construction is crucial for managing project expenses. However, current management practices often overlook pre-construction cost management, leading to budget overruns and project delays during later stages. To ensure the smooth execution and cost control of highway construction projects, this paper examines the significance of cost control, evaluates the current state and challenges of highway construction, and proposes strategies for cost management. These strategies aim to establish a robust foundation for cost management in highway projects.