The invention discloses a blank manufacturing device for a ceramic sphere with a built-in metal skeleton. The device comprises a stepping type conveyor belt and a lower semispherical mold conveyed through the stepping type conveyor belt. The lower semispherical mold at least passes four stations in the conveying process, wherein a conveying pipe is arranged above the first station, a device for containing a metal skeleton is arranged above the second station, an upper semispherical mold which is in buckled connection with a molding press is arranged above the third station, an inner cavity of the upper semispherical mold contains bagged powder, and a transferring device is arranged above the fourth station; an inlet of the upper portion of the upper semispherical mold is in a flat circle shape, an upper inner circular groove and a lower inner circular groove are formed in the inner wall of the inlet of the upper portion, and the bottom of the inlet of the upper portion is provided with a powder pressing hole communicated with the cavity of the upper semispherical cavity. The invention further discloses a blank manufacturing method adopting the blank manufacturing device. The method comprises the steps of preliminary filling of powder, skeleton falling, press fitting and rounding of spherical bodies, transferring of spherical blanks and the like. Ceramic spheres with built-in metal skeletons can be subjected to industrial automatic blank manufacturing.