Granularity sorting method for epoxy molding compound powder material

The invention discloses a granularity sorting method for an epoxy molding compound powder material. The method comprises the following steps of: smashing the material through a first-stage hammer type smashing machine, sorting the smashed material in a double-layer sorting sieve, and pouring the fine powder material into a collector from a material outlet at the lower layer through a screen of the double-layer sorting sieve; and screening out rough powder material through the double-layer sorting sieve, smashing the rough powder material again in a two-stage hammer type smashing machine, and directly putting the smashed powder material into the collector. The smashing method is rational and high in operability; the material is smashed twice; moreover, a smashing machine screen and a sorting sieve screen which have different mesh size are adopted, so that powder materials in different granularity distribution ranges can be obtained; the granularity of the powder material is well controlled; the production effi