Laboratory suction filtration device

The utility model provides a laboratory suction filtration device which comprises a suction filtration bottle A and a suction filtration bottle B. A Buchner funnel is arranged above the suction filtration bottle A through a rubber plug, a glass tube is arranged on the suction filtration bottle B through a rubber plug, the upper end of the glass tube is connected with an extraction opening of the suction filtration bottle A through a rubber hose, an extraction opening of the suction filtration bottle B is connected with a vacuum pump, and the vacuum pump is connected with a vacuum pump. And a drying agent is arranged in the suction flask B. The two suction filtration flasks are adopted, different drying agents are added into the second suction filtration flask according to different suction filtration liquids, and an alkaline drying agent is added when acid liquids are subjected to suction filtration; when the alkaline liquid is subjected to suction filtration, an acidic drying agent is added; when neutral liq