▎ 摘　　要

NOVELTY - The utility model claims a multi-cavity fireproof sectional material, the multi-cavity fireproof sectional material comprises multiple chambers, the chamber is composed of multiple frames; comprising a connecting piece, a middle piece, a frame, an expansion strip, the connecting piece is set on one side of the frame, the middle piece is set at the middle part of the frame, the expansion strip is set on one side of the frame. The connecting piece is a plate made of metal material and used for connecting and fixing. the middleware is a plastic piece made of polyvinyl chloride; the middleware is a bad heat conductor. the expansion strip is strip-shaped structure made of graphene material; the expansion strip is thermally expanded. The utility model sets the expansion strip and middleware in different chambers through the multi-cavity structure; the expansion strip is flame retardant by blocking oxygen; the middleware is flame retardant by weak thermal conductivity; the utility model has simple structure and good fireproof performance.