The invention provides a numerical control machining method for a high-temperature-resistant heat-insulation interlayer material component. The method includes the steps: (1) placing a component material blank on a machining tool; (2) positioning the component material blank by positioning characteristics; (3) fixing the positioned component material blank; (4) cutting the edge of the component material blank to obtain an edge cutting component. The component material blank has a heterogeneous layer structure. The method is rapid and mainly used for the field of aerospace industry, civil industry and the like, and component machining precision and quality stability can be greatly improved.