Driven by the advancement of the "dual-carbon" goals and the demand for high-performance concrete in the construction industry, the green and refined development of high-quality sand and gravel aggregate production has become the focus of attention in the industry. Traditional aggregate production lines have problems such as high energy consumption, poor particle shape, and severe pollution, making it difficult to meet modern engineering requirements for aggregate gradation stability and low-carbon production. Taking a high-quality sand and gravel aggregate project with an annual output of 3 million tons as an example, this paper elaborates on the technical schemes of the project, including plant layout, process flow, main equipment, particle gradation, product performance, environmental protection control, and intelligent application.The project adopts a two-stage impact crushing process to produce three types of high-quality aggregates and one type of ordinary manufactured sand. The entire process uses closed conveying via belt conveyors and elevators, achieving a dust emission of less than 5 mg/Nm3 in the plant area. Additionally, the aggregates have good particle shape, excellent gradation, and little surface dust adhesion. By implementing a vertical roller mill system for sand making, the project addresses the quality control problems of traditional sand making processes. This system features high production capacity, low power consumption, and the product sphericity reaches over 0.82. The vertical mill sand making process shows high development potential.