The invention discloses a method for producing an aluminum-manganese-iron alloy, which comprises the following steps: (1) according to steel-making requirements, working out the dosages of scrap steel, metal manganese, ferrotitanium and pure aluminum pig, and mixing the materials; (2) melting; and (3) casting. The method is characterized in that: during melting, the scrap steel, the metal manganese, the ferrotitanium and the pure aluminum pig are melted respectively; and then the melts are mixed in another crane ladle. In the method for producing the aluminum-manganese-iron alloy, the aluminum can be melted at a low temperature as the pure aluminum pig, the scrap steel, the metal manganese and the ferrotitanium are melted independently and respectively, and at the same time, the adhesion of alumina on the lining of a medium-frequency induction furnace is prevented for the melts are mixed in the same crane ladle. Thus, the method has the advantages of avoiding burning loss caused by aluminum, improving the service life of the lining due to the fact that the inside of the lining has no alumina slag so no alumina slag is adhered to the inner wall of the lining, reducing the burning loss of the aluminum and stabilizing the quality of aluminum, manganese and iron.