The invention discloses a feeding mechanism for feeding magnets and judging the polarity of the magnets. The feeding mechanism comprises a supporting frame, material rails installed on the supportingframe, polarity detecting modules installed at the inlet ends of the material rails, material pushing modules installed on the supporting frame and used for pushing the magnets in the material rails to move, blocking modules installed on the supporting frame and used for blocking the magnets and preventing the magnets from dropping out accidentally and clamping and lifting modules installed on thesupporting frame and used for clamping and lifting the magnets sent from the discharging ends of the material rails one by one; and the polarity detecting modules comprise detecting magnets with known polarities, and the detecting magnets are fixed to the inlet ends of the material rails. According to the feeding mechanism for feeding the magnets and judging the polarities of the magnets, the polarity detecting modules used for detecting the polarities of the magnets in the detecting material rails are arranged at the inlet ends of the material rails, the polarities of the magnets on the material rails are judged through the polarity detecting modules, and the magnets with the same polarities are discharged; and the working efficiency and quality of the feeding mechanism for feeding the magnets and judging the polarities of the magnets can be ensured, the structure of the polarity detecting modules is extremely simple, and the cost of the feeding mechanism for feeding the magnets andjudging the polarities of the magnets is low.