The invention discloses a device and method for producing carbonyl nickel powder. The device comprises a rectifying tower, a first heat exchanger, a second heat exchanger, a return tank and a resolver; and the distillation purification process of nickel carbonyl is conducted under the conditions of introducing nitrogen and cooling part of an overhead product of the rectifying tower, and the resolving process of the part not to be cooled in the overhead product of the rectifying tower is conducted in the specific temperature interval and specific pressure range. According to the device and method for producing the carbonyl nickel powder, the technological process is short, operation is easy and convenient, the effect is remarkable, and implementation is easy. Through detection, the impuritycontent of the carbonyl nickel powder and other indexes are all within the customer requirement range.