▎ 摘　　要

NOVELTY - The oxidant adding device has a feeding inlet and a feeding pipe. The feeding pipe is provided with an opening. The lower end of bin is equipped with screen mesh and a valve. The valve and air inlet are connected with the feeding pipe. One end of air inlet and feeding pipe is connected to a reaction chamber. The gas inlet is connected with the feeding pipe. The feeding pipe is provided with a safety valve. Other end of air inlet and feeding pipe is provided with a pipeline interface. The pipeline interface is externally connected with the air inlet. USE - The oxidant adding device is useful for preparing graphene. ADVANTAGE - The oxidant adding device is capable of preparing graphene with excellent quality in a controllable manner.