Screen mesh tensioning mechanism and vibrating screen classifier

The utility model provides a screen mesh tensioning mechanism and a vibrating screen classifier, the screen mesh tensioning mechanism comprises a screen mesh frame supported on the lower side of a first screen mesh and an elastic pressing assembly connected to the edge part of the first screen mesh, and the elastic pressing assembly comprises a tensioning plate and a spring piece; the tensioning plate is arranged on the side, away from the screen frame, of the first screen so that the first screen can be attached to the screen frame, and the spring part pulls the tensioning plate in the direction away from the center of the first screen so that the first screen can be kept tensioned. According to the screen mesh tensioning mechanism, the first screen mesh is fixedly attached to the screen mesh frame through the tensioning plate, the spring piece is matched with the tensioning plate, when materials are stacked, the screen mesh tensioning mechanism can evenly apply outward acting force to the first screen mesh,