This utility model relates to the field of
single crystal furnace heating technology, and in particular to an
auxiliary heating device for a
single crystal furnace. It includes a heating coil fitted inside the outer shell of the
single crystal furnace, located above the
crucible. The heating coil is composed of at least one layer of ring-shaped, nested tubes, spirally wound along the central axis to form a multi-layered, ring-shaped stack with a central cavity. This utility model enables heat to be uniformly transferred from multiple directions to the area above the
crucible, avoiding localized overheating or undercooling. By changing the structure of the heating coil, the problem of uneven temperature distribution is solved. Compared to traditional heating components, it can heat the
silicon material more efficiently and uniformly, improving the melting effect of the
silicon material and the quality of
single crystal growth.