Lost wax casting is also known as investment casting. It has the process for Wax Pressing, Wax Repairing, Tree Formation, Dipping, Melting Wax, Casting Molten Metal, and Post-processing. Lost Wax Casting is the process that uses wax to make a wax mold according to the part to be cast and then coating the wax mold with mud, which is the mud mold. After the clay mold dries, it is placed in hot water to melt the inner wax mold. And then, take out the clay mold that has melted the wax mold and bake it into a pottery mold. Generally, when making the mud mold, the sprue is left. Pour the molten metal into the sprue. After the mold is cooling, we can get the lost wax casting parts.