The process mineralogy of a low-sulfide refractory gold ore was studied using testing techniques such as scanning electron microscopy，MLA,and electron probe.The research results indicate that the gold grade of the ore is 2.89 g/t,with gold being the only valuable element present,sulfur content of 0.14 %,and ore oxidation rate exceeding 75 %.The ore belongs to the low-sulfide refractory gold ore type.In the run-of-mill ore product with a particle grinding fineness of -0.074 mm accounting for 90 %,gold affected by preg-robbing matters accounts for 48.10 %,gold encased in gangue minerals accounts for 6.92 %,and gold occurring as monomer and associated gold accounts for 44.98 %.Fine-grained inclusions,excessively coarse particle size,and susceptibility to the influence of preg-robbing matters are the main mineralogical factors affecting gold recovery.