FEP colorful particle processing method

The invention discloses a processing method for uniform-colored FEP colorful particles. The processing method comprises the following steps: (1) fluorination pretreatment: FEP fluororesins in raw materials are added in a reactor; fluorine and nitrogen mixed gas with a certain ratio is introduced for reaction by a period of time at a proper temperature; and instable end groups on FEP are replaced by fluorination to obtain fluorinated FEP fluororesins; (2) mixing: the fluorinated FEP fluororesins, dispersing agents, modified fillers and pigment are put in a container for mixing according to a certain ratio for full mixing; (3) melting extrusion: the uniform-mixed materials in the step (2) are added in an extruder for melting extrusion molding at a proper temperature; and (4) postprocessing:the molded products extruded in the step (3) are subsequently processed, including cooling, dehydration, dicing and drying. In the fluorination process of FEP fluororesin base stocks, through removalof active end groups, the