The invention relates to a steelmaking alloy and slag material automatic discharging and weighing putting device and method, and belongs to the technical field of steelmaking metallurgy. According tothe technical scheme, a trolley track (6) is arranged in the middle of a steel structure bracket (7), a weighing feeding trolley (2) is arranged on the trolley track, a weighing device is arranged onthe weighing feeding trolley, and the weighing feeding trolley is provided with a trolley vibrating feeding machine (1) in a matched manner; and the upper part of the steel structure bracket is provided with a plurality of material bins (4), a material bin vibrating feeding machine (3) is arranged below each material bin, the material bin vibrating feeding machines are arranged through suspensionmechanisms (5), the weighing feeding trolley is provided with a discharging pipe, the trolley vibrating feeding machine (1) and the discharging pipe are arranged together, and discharging pipes of themultiple material bin vibrating feeding machines (3) are jointly provided with the weighing feeding trolley in a matched manner. The steelmaking alloy and slag material automatic discharging and weighing putting device and method have the advantages and effects that feeding of a refining furnace can be efficiently and accurately achieved during refining, the precise control ability of a steel component is improved, the labor intensity is reduced, and the product quality is improved.