Device and method for automatically grinding spheroidal gem jade

The invention relates to a device and a method for automatically grinding spheroidal gem jade. The device comprises a vertical transmission mechanism, a magnetic grinding mechanism and a rotating mechanism, wherein a permanent magnetic pole and an auxiliary magnetic pole are parallelly and oppositely arranged in the magnetic grinding mechanism to form a magnetic loop; the permanent magnetic pole is driven by the vertical transmission mechanism to rotate, the auxiliary magnetic pole is driven by the rotating mechanism to rotate, and the rotating directions of the permanent magnetic pole and the auxiliary magnetic pole are opposite; a retainer allowing the spheroidal gem jade to be placed thereon is fixedly arranged between the permanent magnetic pole and the auxiliary magnetic pole; and the upper side and the lower side of the retainer are filled with a magnetic abrasive to wrap the spheroidal gem jade therein. Through the synergistic effect between the auxiliary magnetic pole and the permanent magnetic pole,