The invention relates to an amphibole type primary iron ore grading process. The amphibole type primary iron ore grading process comprises the steps that iron ore with iron mineral disseminated grainsize being P80=17 microns is subject to rough breaking and primary dry in-advance magnetic separation, primary dry in-advance magnetic separation concentrate with the grade being 28.62%, the recoveryrate being 98.51% and the particle size being P80=150 microns serves as raw materials; the process is characterized in that raw ore is subject to semi-automatic-grinding screening closed loop grinding, wet in-advance magnetic separation, two-stage stage grinding stage low intensity magnetic separation, one-roughing one-refined three-scavenging reverse flotation, three-stage closed loop superfine ore grinding and strong magnetic separation process grading, wherein the semi-automatic-grinding screening closed loop grinding product granularity is 0 mm-3 mm, the two-stage closed loop grinding product granularity is P80=30 microns, the three-stage closed loop grinding product granularity is P80=17 microns, and the good indexes with the final iron ore concentrate iron grade being 65.50%, the recovering rate being 76.00%, the comprehensive gangue iron grade being 11.30% and the recovery rate being 24.00% are finally obtained.