The invention discloses a concentric biaxial cooking machine motor. An external coupling is connected with a large shaft, external transmission teeth on the periphery of the external coupling conducttransmission on an agitating device, an inner coupling is connected with a small shaft, inner transmission teeth inside an inner coupling conduct transmission on another agitating device, so that a cup body with the agitating device can be separated from the large shaft and the small shaft, the motor is not required to be taken together when food is poured or the cup body of the cooking machine iscleaned, and use is convenient; the outer coupling is internally provided with a chamber for placing the inner coupling or the small shaft, so that the transmission of the large shaft and the small shaft does not interfere with each other, and the design is reasonable.