Tests on the supplementation method for the silver content determination in silver ores,silver concentrates and silver-bearing materials(lead anode slime) in fire assay are carried out.5 ways for supplementation including overall flow supplementation method with pure silver,fire assay partial recovery method with evenly mixed and processed cupel and residue,atomic absorption determination supplementation method with evenly mixed and processed cupel and residue,cupellation supplementation method with secondary recovery of residue and pure silver,ungraded fire assay method with residue and cupel are studied.The advantages and disadvantages of each method are summarized.As for the atomic absorption determination supplementation method with evenly mixed and processed cupel and residue,the optimal sample weight and sample dissolution are determined.The study provides reference for the supplementation methods for the silver content determination in fire assay.