The present invention discloses a demagnetizing apparatus for powdery cathode material of a lithium battery. The demagnetizing apparatus comprises a housing. The housing is provided with a feed hopper. Transverse rollers are bilaterally symmetrically arranged below the corresponding feed hopper on a top in the housing. A bin is arranged in the feed hopper. Fixed rods are bilaterally symmetricallyarranged on the bin. The outer ends of the fixed rods are fixed to the inner wall of the feed hopper. Supporting plates are bilaterally symmetrically arranged in the middle position of the top in thehousing. The top ends of the supporting plates are fixed to the bottom of the bin. Two transverse rollers are respectively sleeved between the supporting plates and the side wall of the housing. The rollers on both ends in the transverse rollers are respectively sleeved on first bearings arranged in corresponding positions of the supporting plates and the side wall of the housing. A vertical rotating shaft is arranged in the middle position of the bottom of the bin. The present invention provides a demagnetizing apparatus for powdery cathode material of a lithium battery. The demagnetizing apparatus is smartly configured in structure and reasonably arranged. A multistage demagnetizing mechanism is smartly configured in the demagnetizing apparatus, thereby realizing efficient and thorough demagnetization of the powdery cathode material of the lithium battery. Furthermore, the demagnetizing apparatus is convenient in discharging.