In the context of the intensifying overcapacity contradiction and increasingly stringent environmental protection policies in the sand and gravel industry, the design of sand and gravel aggregate production lines is confronted with the dual challenges of efficiency improvement and refined management. Traditional design methods for aggregate production lines rely on manual experience, which rely on manual experience, are associated with problems such as large deviations in product proportion calculations, unreasonable equipment selection, and lengthy design cycles. Based on a comprehensive database of process equipment, this study developed a set of process design and simulation system software for sand and gravel aggregate production lines, which integrates functions including intelligent drawing of process design flowcharts, dynamic calculation of product proportions, automatic analysis of product particle size distribution curves, and optimization of main equipment selection. The software is capable of supporting flexible switching between multiple modes of product schemes.Verification by a limestone aggregate production line project with an annual output of 3 million tons in East China shows that after the application of this software, the design efficiency is improved by approximately 100%, and the accuracy rate of equipment selection reaches 92%. This significantly enhances the market adaptability of the production line, providing reliable technical support for the digital and intelligent design of sand and gravel aggregate production line projects.