Following the development and further improvement of the ecosystem approach to the development of saline marginal lands, a theoretical justification has been prepared for the conceptual model of the technology for the management of the salinity and nutritional regime of marginal lands, where the development of such land takes place in three symmetrical and parallel-sequential actions in time at annual intervals on the basis of biologination of land reclamation, programming productivity of agricultural crops with desalinization of the saline soil to a certain acceptable level subject to leaching limit and chemical reclamation, taking into account the environmental management requirements and classification of the saline soil and salt tolerance of agricultural crops. In addition, the distinctive peculiarities of the proposed technology are the possibility to implement the entire complex of environment-forming functions of the natural system, including the assessment of energy resources of the soil and vegetation cover (various agro-ecological categories), productivity of agricultural land using the reference yield methods, water consumption deficit of agricultural land and leaching limits, ensuring the gradual achievement of the safe level of salinity, using the biological characteristics of salt-tolerant crops (halophytes) and chemical reclamation, based on gypsuming of the topsoil, owing to a balanced supply of mineral fertilizers, and based on their rationing, taking into account planning the yield of cultivated crops.