The utility model relates to a lubricating device for aluminum hot-rolled shears. the lubricating device comprises a plurality of groups of oil mist lubricators arranged in front of the aluminum hot rolling scissors, an oil tank connected with the oil mist lubricators and compressed air, the compressed air is connected with an air inlet connector of the oil mist lubricator, an oil outlet of the oil tank is connected with an oil inlet connector, the oil tank comprises a tank body, a filling port formed in the upper portion of the tank body and an oil outlet pipeline penetrating into the tank body, and a filter is arranged at the end, extending into the bottom of the tank body, of the oil outlet pipeline. The utility model has the beneficial effects that: 1, the device is convenient to use and high in efficiency; 2, the oil mist atomized by the oil mist lubricator is uniform in lubrication, and the lubrication dosage is saved; 3, the structure is simple, and the investment cost is low; and 4, the oil mist amount can be adjusted according to the lubricating requirement, and the adjustment is simple and convenient.