Single crystal furnace heating device and single crystal furnace

The utility model discloses a single crystal furnace heating device and a single crystal furnace, relates to the technical field of single crystal furnaces, and aims to solve the problem that a second heating ring is not uniform in shape and is easy to break in the prior art. The single crystal furnace heating device comprises a heating ring used for being arranged outside a crucible of the single crystal furnace in a sleeving mode, and the two sides of the heating ring in the axial direction are the first side and the second side respectively. The heating ring is formed by arranging and connecting a plurality of U-shaped strips at intervals in the circumferential direction, the notch ends of the U-shaped strips are located on the same side of the heating ring and are connected in a flush mode, and an interval groove is formed between every two adjacent U-shaped strips. The U-shaped strips comprise a plurality of first U-shaped strips and a plurality of second U-shaped strips, the first U-shaped strips and th