▎ 摘　　要

NOVELTY - The utility model claims a graphite barrel for preparing graphene, comprising a barrel body, a heat reflecting screen, the bottom of the barrel body around the cylinder inner periphery uniformly distributed with four inverted trapezoid with the barrel body side wall of vertical bumps, each bump is provided with a can bulge along the length direction movement of the clamping block, the clamping block lower side provided with a groove matched with the bulge of the clamping block outer side wall are connected through a spring side and the barrel body. The utility model is featured with simple structure, small occupied space, not only the silicon carbide substrate can be fixed at the bottom, but also by adjusting the clamping position so as to adapt to the silicon carbide substrate with different sizes.