Crucible structure

The utility model discloses a crucible structure which comprises a crucible body and a melting block, the melting block is placed in the crucible body, and the melting block and the crucible body are made of the same material. The melting block is provided with a melting cavity, the melting cavity is used for containing alloy to be melted, main metal to be melted is placed in the crucible body, and the melting point of the alloy placed in the melting cavity is lower than that of the main metal placed in the crucible body; through holes are formed in the bottom of the melting cavity. When crucible melting is carried out, main metal with the high melting point is added into the crucible body, and alloy with the low melting point is placed in the melting block. After the main metal is melted, due to the fact that the melting block and the crucible are made of the same materials, the melting block can float above the main metal liquid, alloy liquid located in the melting cavity can gradually flow into the crucibl