Funnel capable of being filled with adsorption filtering material

The funnel comprises a funnel body and a funnel neck, a fixing mechanism is arranged between the funnel body and the funnel neck, the fixing mechanism comprises an extension block, a clamping block and a fixing ring, a spiral opening is formed in the side face of the extension block, and the clamping block is arranged in the spiral opening. A groove and a screw hole are formed in the clamping block, the end of the extending block penetrates into the groove, a screw rod is in threaded connection with the interior of the screw hole, one end of the screw rod can penetrate into the spiral opening, and an inclined block is arranged at the top of the extending block; through the designed fixing mechanism, the funnel body or the funnel neck can be independently replaced when the funnel body or the funnel neck is locally damaged in use, the problem that the whole funnel needs to be replaced traditionally is solved, the use cost is reduced, materials are saved, and the funnel is convenient to replace and easy to opera