The present invention relates to a metal spherical powder impurity removal device and impurity removal method. The device comprises a first collection container, a second collection container, a funnel and a separation plate, wherein the second collection container is arranged inside the first collection container, and the second collection container is arranged inside the first collection container. The end face of the collection container is lower than the end face of the first collection container, the separation plate is arranged inside the second collection container, and the end face of the second collection container is inclined at an angle, and does not contact the second collection container, and the funnel is arranged in the two collection containers. Above, and keep a distance between the outlet end of the funnel and the separation plate, the funnel is filled with metal spherical powder to be removed, when the metal spherical powder to be removed falls to the separation plate, the metal spherical powder enters the first collection container, and the impurities enter the second Two collection containers, the present invention realizes the removal of impurities from the metal spherical powder, without the need for power supply, transmission and other power devices, low price, simple structure, no size, shape and position accuracy requirements for processing and assembly, and can achieve high-efficiency and low-cost removal of metal spherical powder. miscellaneous.