Clamp for preparing graphene and method for preparing graphene

The invention relates to a clamp for preparing graphene and a method for preparing graphene. The clamp comprises a horizontal top frame, a bottom frame and a loading tray, wherein the top frame and the bottom frame are fixedly connected through a first side plate, a second side plate and a baffle plate, which are vertically arranged; both the top frame and the bottom frame are of plane structures with openings in the middle parts; the top frame, the bottom frame, the first side plate, the second side plate and the baffle plate form a quad structure with an opening in one side surface; the first side plate and the second side plate are oppositely arranged in parallel; a plurality of tray grooves are uniformly formed in both the first side plate and the second side plate; two opposite side edges of the loading tray are respectively inserted in the tray grooves. The clamp reasonably utilizes the limited growth space in a process cavity, so that the quantity of the graphene thin films prepared in one batch is increased to the greatest extent to realize the minimization of the resource waste and the maximization of the cost while ensuring the quality of the prepared graphene thin films.