Plant for the pressure slip casting of hygienic-sanitary articles, comprising: - at least a base framework with a first bearing structure, a second bearing structure and an intermediate bearing structure aligned along a substantially horizontal longitudinal direction; - at least a guide longitudinal structure (8, 9) which is fitted on top of said bearing structures (5, 6, 7), extends along said longitudinal direction and is split into: - at least a first portion, arranged between said first bearing structure and said intermediate bearing structure, and - at least a second portion, arranged between said second bearing structure and said intermediate bearing structure; - a plurality of moulds (10, 11), hanging sliding from said guide longitudinal structure (8, 9) and moving longitudinally between a work configuration, wherein said moulds (10, 11) are arranged in a pack, each mould (10, 11) and the next defining at least an inner cavity for the pressure slip casting of ceramic material and the forming of hygienic-sanitary articles, and a discharge configuration, wherein said moulds (10, 11) are reciprocally moved away for the discharge of said hygienic-sanitary articles, said moulds (10, 11) being split into: - at least a first group of moulds moving along said first portion of the guide longitudinal structure (8, 9), and - at least a second group of moulds moving along said second portion of the guide longitudinal structure (8, 9); - pressing means suitable for pressing longitudinally said moulds (10, 11) one against the other in said work configuration; - pressure feeding means of said ceramic material inside said moulds (10, 11) in said work configuration; wherein: - said first group of moulds is positionable in said discharge configuration when said second group of moulds is in work configuration and said second group of moulds is positionable in said discharge configuration when said first group of moulds is in work configuration; and - said moulds (10, 11) are associated with said guide longitudinal structure (8, 9) by interposition of a plurality of supporting frames (15, 16, 17) that are sliding along said guide longitudinal structure (8, 9) and support said moulds (10, 11); characterized by the fact that said supporting frames (15, 16, 17) comprise rotation means (19, 20) for rotating said moulds (10, 11) around an axis substantially horizontal and at right angles to said longitudinal direction, said rotation means (19, 20) being suitable for allowing the rotation of said moulds (10, 11) between a work position and a discharge position of said hygienic-sanitary articles and comprising at least a rotoidal support with which is associated one of said moulds (10, 11) and a driving system for driving the rotoidal motion of said mould (10, 11) between said rotoidal support and a command element mounted on top of said supporting frame (15, 16, 17). - at least a base framework with a first bearing structure, a second bearing structure and an intermediate bearing structure aligned along a substantially horizontal longitudinal direction; - at least a guide longitudinal structure (8, 9) which is fitted on top of said bearing structures (5, 6, 7), extends along said longitudinal direction and is split into: - at least a first portion, arranged between said first bearing structure and said intermediate bearing structure, and - at least a second portion, arranged between said second bearing structure and said intermediate bearing structure; - at least a first portion, arranged between said first bearing structure and said intermediate bearing structure, and - at least a second portion, arranged between said second bearing structure and said intermediate bearing structure; - a plurality of moulds (10, 11), hanging sliding from said guide longitudinal structure (8, 9) and moving longitudinally between a work configuration, wherein said moulds (10, 11) are arranged in a pack, each mould (10, 11) and the next defining at least an inner cavity for the pressure slip casting of ceramic material and the forming of hygienic-sanitary articles, and a discharge configuration, wherein said moulds (10, 11) are reciprocally moved away for the discharge of said hygienic-sanitary articles, said moulds (10, 11) being split into: - at least a first group of moulds moving along said first portion of the guide longitudinal structure (8, 9), and - at least a second group of moulds moving along said second portion of the guide longitudinal structure (8, 9); - at least a first group of moulds moving along said first portion of the guide longitudinal structure (8, 9), and - at least a second group of moulds moving along said second portion of the guide longitudinal structure (8, 9); - pressing means suitable for pressing longitudinally said moulds (10, 11) one against the other in said work configuration; - pressure feeding means of said ceramic material inside said moulds (10, 11) in said work configuration; - said first group of moulds is positionable in said discharge configuration when said second group of moulds is in work configuration and said second group of moulds is positionable in said discharge configuration when said first group of moulds is in work configuration; and - said moulds (10, 11) are associated with said guide longitudinal structure (8, 9) by interposition of a plurality of supporting frames (15, 16, 17) that are sliding along said guide longitudinal structure (8, 9) and support said moulds (10, 11);