When the bag breaking machine is working, first use an electric hoist to lift the packaging bag with limestone powder into the equipment chassis, and automatically unpack the packaging bag in a sealed environment or manually untie the bag discharge port to make the material fall . Then the device automatically opens the iris valve, and the material in the packaging bag falls into the storage hopper by its own gravity. In this process, a rapper or massager can also be used to cause the graphene material to fall. Because the working environment is completely sealed and the dust will not leak out, it meets the requirements of what we call dust-free unloading. In order to realize the continuous operation of dust-free unloading, the equipment has a built-in dust removal and adsorption device, which can timely and quickly concentrate the adsorption treatment of dust, realize dust-free unloading and maintain the ability of continuous operation.