NOVELTY - The device comprises a vacuum chamber maintaining the vacuum atmosphere, an electronic beam irradiation part equipped in the vacuum chamber to irradiate an electronic beam, a silicon melting part that is arranged within the electronic beam irradiation part and melts the silicon material with the electronic beam to prepare a silicone molten metal, a molten metal input part that is connected with the silicon melting part and injects the molten metal into a cooling channel solidifying the molten metal, and a starting block having a silicone button equipped inside a solidification part.    USE - The device is useful for preparing poly-silicon (claimed) that is used to prepare a semi-conductor wafer or useful in a solar cell.    ADVANTAGE - The device prevents the penetration of the impurity inside the starting block and the pollution of the silicone molten metal from the outside contacts, and prevents the damage of the one-way direction solidification part.    DETAILED DESCRIPTION - The device comprises a vacuum chamber maintaining the vacuum atmosphere, an electronic beam irradiation part equipped in the vacuum chamber to irradiate an electronic beam, a silicon melting part that is arranged within the electronic beam irradiation part and melts the silicon material with the electronic beam to prepare a silicone molten metal, a molten metal input part that is connected with the silicon melting part and injects the silicone molten metal into a cooling channel solidifying the molten metal, and a starting block having a silicone button equipped inside an one-way direction solidification part, where the one-way direction solidification part and a dummy bar are welded into the silicone button, and the silicon material is charged in a particle form. The silicone molten metal is supplied from the silicon melting part into the one-way direction solidification part through a molten metal guide portion. The electronic beam irradiation part irradiates the electronic beam in an upper portion of the one-way direction solidification part. The cooling channel is arranged in a lower part of a casting container.