The utility model discloses an indoor device for evaluating the performance of a sand preventing tube. The device comprises an airtight autoclave body, a diversion net and a tubular supporting frame,wherein the diversion net is tubular and nested in the autoclave body; the tubular supporting frame is positioned at the axle center of the autoclave body; the diversion net and the lower end of the tubular supporting frame are both connected with the bottom surface of the autoclave body; and the side wall of the autoclave body is provided with at least one oil inlet, and the bottom surface thereof is provided with an oil outlet which is positioned at the inner side of the side wall of the tubular supporting frame. The device can simulates stratigraphic characteristics of an oilfield, and conducts an evaluation test of the sand production regularity with radial flow under a confining pressure situation, so as to lead stratigraphic sand production characteristics to more accord with stratigraphic conditions.