The utility model relates to a device for reducing converter steelmaking charging dust. The device comprises a converter dust removal system pipeline (1), an alloy overhead stock bin (3), an alloy blanking launder (4) and an alloy swinging groove (8), and is characterized in that an alloy dust removal pipeline (7) is arranged between the dust removal system pipeline (1) and the alloy blanking launder (4); the alloy dust removal pipeline (7) is internally provided with an alloy dust removal fan (2); an alloy dust removal fan switch (5) is used for turning on or turning off the alloy dust removal fan (2); the alloy dust removal pipeline (7) is connected with the alloy blanking launder (4) at the tail end of the alloy blanking launder (4) or close to the tail end; and the area ratio of cross sections of the converter dust removal system pipeline (1) and the alloy dust removal pipeline (7) is 2: 1. The device is simple in structure and convenient to use, can effectively prevent alloy dust from scattering around, and can be widely applied to a converter working area of the alloy overhead stock bin that alloy is charged to a ladle.