This series of ultra-fine phenolic resin powder is made of fast-curing linear phenolic resin as the main raw material, supplemented by quantitative curing agent, and is prepared by automatic ultra-fine grinding process. The product has the characteristics of uniform fineness distribution, fast molding and good thermal rigidity of the die. In the application of molding compound, it can improve the thermal strength of the die and greatly improve the molding efficiency of the parts.