Die-casting mold is a tool for casting metal parts, which is used to complete the die-casting process on a special die-casting machine. The basic process of die-casting is: firstly, liquid metal is poured into the mold cavity at low or high speed, and the mold has a movable cavity surface. The use of liquid metal cooling technology not only eliminates the shrinkage and pore defects of the blank, but also makes the internal structure of the blank reach the broken particles in the forging state, which significantly improves the comprehensive mechanical properties of the blank. In the automotive industry, die-casting parts have been widely used, especially lightweight new energy structural parts. There are many kinds of die-casting molds and alloys. Today we mainly take the horizontal cold chamber die casting machine as the main body and analyze the molds used for aluminum alloy, magnesium alloy, zinc alloy and other metal raw materials. Die-casting materials, die-casting machines and molds are the three major elements of die-casting production. The mold design and processing process generally includes: process analysis, schedule confirmation, three-dimensional confirmation, full size inspection, three-dimensional internal mold, internal mold blanking, two-dimensional internal mold, three-dimensional assembly, project review, part blanking, part drawing, mold Frame drawing, material list, trial model. For the automotive industry, almost all molds are non-standard processing, and there are few repetitive molds. Therefore, the process of mold design and processing is a long one and needs to go through this process. At the same time, the design and processing capabilities of different manufacturers are uneven, and the equipment varies greatly. Starting from the mold design and manufacturing process, the design steps are decomposed, and the complex mold is peeled layer by layer to understand the actual cost of the mold. For example, through empirical accounting, we can know the profit and profit of the mold factory. The general structure of die-casting mold can be divided into mold base (mold base), core (core) and standard accessories such as guide post, guide sleeve, cylinder, tubing, etc. These are the basic components of the mold. If the precision of the mold is required to be higher, the need for other parts and molds is a difficult point in cost accounting, because the mold involves a wide variety of parts, and the corresponding costs of different processing techniques are also different. According to different part types and design requirements, the design of die-casting molds is also very different, such as whether it needs vacuum, whether there is a slider, whether it needs to be used on a large-scale die-casting machine, etc. Therefore, the size of the mold is relatively large. These differences lead to differences in mold design and processing. In addition, the selection of the mold core directly affects the service life of the mold.