The invention discloses a three-dimensional device special for breeding silkworms. The three-dimensional device comprises a rearing tray frame, pairs of cross rails, a support frame, a pair of cross rails, two overturning mechanisms, and a plurality of rearing trays, wherein the rearing tray comprises four first columns and four first beams; the cross rails are arranged between the four first columns from top to bottom, and two ends of each pair of cross rails are fixedly connected with the two adjacent first columns; the support frame comprises two second columns and second beams; the pair of cross rails are arranged between the rearing tray frame and the support frame; the two overturning mechanism are respectively arranged on the support frame and the rearing tray frame; each of the rearing trays corresponds to one pair of cross rails. The three-dimensional device provided by the invention can rapidly complete sand removing and material replacing processes without direct contact with the silkworms in a time and labor-saving manner, can improve labor efficiency of silkworm breeding industry, increases yield, and has relatively high economic and practical values.