▎ 摘　　要

NOVELTY - This utility model relates to processing auxiliary device field, especially a worktable. In order to solve the shortcoming of the existing technology, the utility model claims a graphene preparation device, comprising a table body, the table body is provided with feeding port, wherein it further comprises a pneumatic conveyor with drive device; receiving pipes connecting pneumatic conveyor with feed, a detachable sealing cover is hermetically installed on the working table main body, a switch, the pneumatic conveyor is under the collecting pipe part, the switch and a pneumatic conveyor of power device and used for controlling the on and off of the power device, the switch includes a switch clip; a switch base and a reset spring, the reset spring is connected and a switch elastic sheet on the switch base, the offsetting spring is in the off state, and when it is greater than the pressure switch is located in the conducting state when the reset switch.