A portable facility for the manufacture of prefabricated concrete elements for concrete towers, comprising a floor on which the following are disposed: at least one concreting area and at least one configuration area for the forming of the internal framework of the prefabricated concrete elements, where the concreting area comprises at least one mould for the forming of the prefabricated concrete elements, wherein the floor comprises a modular concrete slab which in turn comprises, at the concreting area, at least one concrete module configured to withstand the stresses associated at least with the weight of the mould for the forming of the prefabricated concrete elements and of the respective prefabricated concrete element, wherein the configuring area for the internal framework of the prefabricated concrete element comprises at least one metal structure which acts as a pattern for the configuration of the framework of the prefabricated concrete elements, and in the framework configuring area: • the modular concrete slab comprises at least one concrete module configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, or • the floor comprises a number of supporting modules, configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, comprising at least one metal element; and wherein the concrete modules of the concreting area are of a greater thickness than the concrete modules of the framework configuration area, or the supporting modules for the metal structures in the framework configuration area, respectively. at least one concreting area and at least one configuration area for the forming of the internal framework of the prefabricated concrete elements, where the concreting area comprises at least one mould for the forming of the prefabricated concrete elements, wherein the floor comprises a modular concrete slab which in turn comprises, at the concreting area, at least one concrete module configured to withstand the stresses associated at least with the weight of the mould for the forming of the prefabricated concrete elements and of the respective prefabricated concrete element, wherein the configuring area for the internal framework of the prefabricated concrete element comprises at least one metal structure which acts as a pattern for the configuration of the framework of the prefabricated concrete elements, and in the framework configuring area: • the modular concrete slab comprises at least one concrete module configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, or • the floor comprises a number of supporting modules, configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, comprising at least one metal element; and • the modular concrete slab comprises at least one concrete module configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, or • the floor comprises a number of supporting modules, configured to withstand the stresses associated with at least the weight of the metal structure and of the framework of the prefabricated concrete elements, comprising at least one metal element; and wherein the concrete modules of the concreting area are of a greater thickness than the concrete modules of the framework configuration area, or the supporting modules for the metal structures in the framework configuration area, respectively.