The utility model discloses a device for mixing iron powder, which comprises an underframe and is characterized in that a plurality of rotating rollers which are arranged in a row are rotatably installed on the underframe, a mixing barrel is arranged between every two adjacent rotating rollers, an end cover is arranged at the mouth of the mixing barrel and iron power mixtures are contained in the mixing barrels; and a motor is installed on the underframe and the rotating rollers are connected with the motor in a driving way. The device has the advantages that the structure is simple, the iron powder in the mixing barrels can be ensured to be fully mixed with other powder, the raw materials are well prepared for subsequent production, the production cost is saved and the practical value is very high.