Improved plasma injection type graphite purification device

The utility model belongs to the technical field of graphite purification, and particularly relates to an improved plasma injection type graphite purification device which comprises a purification box, a top cover is arranged at the top of the purification box, a material storage box is arranged in the purification box, one side of the material storage box is fixedly connected with a fixing column, one side of the fixing column is fixedly connected with a fixing plate, and the other side of the fixing plate is fixedly connected with a plasma injection device. A fixing column is arranged on the top cover, an adjusting plate is hinged to the fixing column, one end of the adjusting plate is attached to the inner wall of the purification box, the fixing plate is matched with the adjusting plate, and an alignment hole corresponding to the storage box is formed in the top cover; the assembly capable of rapidly reducing the pressure intensity in the graphite purification space is composed of the fixing column, the f