Sandstone separator

The utility model relates to the technical field of sand and stone separators, in particular to a sand and stone separator which comprises a sand collecting hopper with an upward opening, a sand screening net is rotationally embedded in the opening of the sand collecting hopper, and the height of the upper surface of the sand screening net is gradually reduced from the center of the sand screening net to the edge of the sand screening net. A driving mechanism for driving the sand screening net to rotate is arranged on the sand collecting hopper; a plurality of circles of baffle units are arranged on the upper surface of the sand screening net, each baffle unit comprises a plurality of material baffles which are arranged in the circumferential direction around the axis of the sand screening net and installed on the upper surface of the sand screening net, every two adjacent material baffles in the same set of baffle units are arranged at intervals, and the material baffles in every two adjacent sets of baffle