Stereo projection display device for halls

The invention belongs to the field of projection devices, discloses a stereoscopic projection display device for a hall, and aims to solve the problem that an existing stereoscopic projection display device for an exhibition hall of an aquarium is poor in imaging effect. The device comprises a box body, the top of the box body is provided with an opening communicated with an inner cavity of the box body, the top of the box body is provided with a projection assembly, the projection assembly comprises a projection cover, the projection cover is arranged above the opening in a sleeving mode, the top of the box body is provided with a discharging opening located outside the projection cover, and a carrying frame slidably connected with the side wall of the box body is inserted into the side wall of the box body; a side plate locked with the box body is arranged on the side wall of the carrying frame; a vertically-arranged conveying belt is fixed in the carrying frame through a supporting column. Moisture in the