The invention relates to the field of electronic material manufacturing, and particularly relates to a magnetic powder screening device. The magnetic powder screening device comprises a shell, a rotary screen, stirring paddles, a rotary bucket and an electromagnet frame, wherein the rotary screen takes the shape of a conical funnel, the bottom of the rotary screen is driven by a rotary shaft, the stirring paddles stands in the rotary screen through an outer frame, a feeding tube is fixed at the top of the shell, the mouth of the feeding tube just faces the interior of the rotary screen, the rotary bucket is conical and arranged outside the rotary screen with a gap, the rotary bucket and the rotary screen coaxially rotate, a collecting bucket is arranged below the rotary bucket, a discharging hole is formed in the collecting bucket, the electromagnet frame is erected on the outer wall of the rotary bucket, and material guide strips are arranged on the inner wall of the rotary bucket; and the magnetic powder screening device provided by the invention has the beneficial effects that magnetic powder can quickly spread and move to the electromagnet under the attraction of the electromagnet, so that the problem that the magnetic powder clusters and is not easy to screen under the action of a magnetic field of the magnetic powder is solved.