The utility model discloses a magnetic material extracting machine which comprises a conveying track, belt transmission devices and a containing box. Each belt transmission device comprises a synchronous belt, a belt pulley and a driving motor. The two groups of belt transmission devices are arranged symmetrically. The position between two opposite synchronous belts is used for clamping magnetic materials. The magnetic material extracting machine further comprises an adjusting device for adjusting the space distance between the two opposite synchronous belts. The adjusting device comprises a pair of adjusting supports fixedly connected with the two opposite synchronous belts respectively, two nut bases which are fixedly arranged on the two adjusting supports respectively, an adjusting screw rod for being connected with the two nut bases and an adjusting handle which is fixedly arranged in the middle of the adjusting screw rod. The mode that the magnetic materials are clamped through the synchronous belts is used, the magnetic materials are transferred to detecting equipment from a production line conveying belt, the synchronous belts are made of flexible materials, secondary damage due to collision during a trans-platform conveying process of the magnetic materials can be effectively lowered during a magnetic material clamping process, accordingly, the pass percent of magnetic material producing is guaranteed, a good sample environment is provided for a following platform, and production benefit maximization is achieved.