Device integrating sample crushing and screening

The invention provides a device integrating sample crushing and screening. The device comprises a sample crushing structure and a screening structure. The sample crushing structure comprises a movable abrasive disc and a static abrasive disc. The movable abrasive disc is provided with a convex arc-shaped crushing part which is convex downwards. The static abrasive disc is provided with a concave arc-shaped crushing part which is concave downwards and is matched with the convex arc-shaped crushing part. A gap between the convex arc-shaped crushing part and the concave arc-shaped crushing part serves as a crushing interval. A feeding port is formed in the upper end of the crushing interval. A guide pipe penetrates through the concave arc-shaped crushing part and enables the crushing interval to communicates with the screening structure. The curvature radius of the arc-shaped contour of the longitudinal section of the convex arc-shaped crushing part is slightly smaller than that of the arc-shaped contour of the