Mine tailing particle size distribution testing device

The utility model relates to a mine tailing particle size distribution testing device. Frame raised lines are arranged on the upper sides of screen frames of screens which are stacked layer by layer, and frame grooves are formed in the lower sides of the screen frames; the frame groove of the upper layer of screen is clamped with the frame raised line of the adjacent lower layer of screen, the frame groove of the lowermost layer of screen is clamped with the raised line at the upper end of the bracket, and the frame raised line of the uppermost layer of screen is clamped with the side edge groove of the cover plate; and the apertures of the screen meshes arranged from top to bottom are gradually reduced layer by layer. The screen cover plate is provided with a water inlet nozzle, and the water receiving hopper is provided with a water outlet nozzle. The screen assemblies with different apertures are arranged above the water receiving hopper, and mortar passes through the screen meshes with different apertures