The invention discloses a liquid double reagent kit for determining ferritin in serum by the utilization of IGY ferritin antibody through latex enhanced turbidimetric immunoassay. The kit provided by the invention contains a reagent R1, a reagent R2 and a ferritin standard, wherein the reagent R1 contains a high-molecular accelerator, an antiseptic, a surfactant, an electrolyte and a buffer; the reagent R2 contains anti-human ferritin antibody bonded polystyrene latex particles, the diameter of which is 100-200nm, and also contains an antiseptic, a surfactant, an electrolyte and a buffer; and the ferritin standard contains antiseptic, purified human ferritin, an electrolyte and a buffer. The kit provided by the invention has advantages of strong singularity, high sensitivity, wide linear range and easy operation, and is applicable to various automatic biochemical analyzers.