1. The precision casting has a wide adaptability and is not limited by the size, thickness and shape complexity of the casting. The production mode is convenient. 2. It can use a wide range of materials and can utilize a large amount of scrap metal and renewable resources. It consumes less compared to the normal forging method. 3. The casting has a certain dimensional accuracy, small machining allowance, saving processing time and metal materials. 4. Low cost, good comprehensive economic performance, low energy consumption and low consumables. 5. It is possible to cast high temperature alloy castings, such as blades of jet engines, streamlined profiles and cooling chambers, etc., which are difficult to form by machining techniques. However, the use of Precision casting technology can not only achieve mass production, but also ensure the consistency of the castings, and avoid the residual of the tool marks after processing. 6. Investment casting has high dimensional accuracy and surface finish, which can reduce the workload of machining. High-demand parts can be satisfied with a small amount of machining allowance. Even some castings can be machined without leaving a polishing and polishing allowance. It can be seen that the precision casting method can save a lot of machine tools and processing time, and greatly saves metal raw materials.