Abstract:With the large-scale development of the construction industry, the construction period of most projects is gradually extended, and the investment amount is also gradually increasing. To ensure the efficiency of project construction, the preparers need to scientifically prepare the engineering budget plan, clarify the highest bidding price, and effectively avoid various risks caused by financial limitations. Based on this, the article starts from the preparation of construction project budgets, explores the concept and methods of preparing construction project budgets (maximum bidding limit), deeply analyzes the impact of this work on project costs, and combines practical engineering cases to clarify the implementation points of preparing construction project budgets (maximum bidding limit).