Background. At present, phosphorus-containing fertilizers produced in the republic are mainly complex nitrogen-phosphorus. They cannot be applied under autumn plowing. Since large nitrogen losses occur resulting of washing it out of the soil by atmospheric precipitation during the winter period before sowing. Generally, nitrogen must be brought before sowing, with sowing and in feeding, whereas phosphoric fertilizers are most effective for plowing. Therefore, it is necessary to increase the production of unary phosphoric fertilizers, such as simple and enriched superphosphates. Purpose. Investigation of the process of obtaining the enriched superphosphate based on processing of mineralized mass with phosphoric acid gypsum slurry, which is used to produce complex NPSCa-containing fertilizer - Suprefos-NS . Methodology. The phosphate raw material is dosed into the phosphoric acid gypsum slurry in such an amount that the weight ratio of the slurry to the feedstock to be from 100: 15 to 100:40. The components are reacted at a temperature of 70°C for 60 minutes. Superphosphate mass was discharged from the reactor, ripens at 95-100°C and cooled to produce product granules. In products of the form P2O5 are determined by photocolorimetric, CaO complexometric methods. Originality. To produce enriched superphosphate, not a mixture of sulfuric and phosphoric acids was offered, but an intermediate product, suprephos-NS, a phosphoric acid gypsum pulp, which in-line process makes it feasible to provide a condition for non-thickened slurry. Findings. It is shown that an increase in the mass fraction of phosphate raw material (PRM) with respect to phosphoric acid gypsum slurry (PAGS) does not effect on the total content of P2O5 in the product, but significantly reduces the relative contents of the assimilable and aqueous forms of P2O5 versus their general form. Thus, when using PAGS with ratio of L:S = 2:1 with an increase in the weight ratio of PAGS: PRM from 100: 15 to 100: 40 in products, the content of P2O5tot. is in the range 22.17-22.95%, and Р2О5acc. : Р2О5tot. by the citric acid decreases from 90.02 tо 71.08%, P2O5acc. : Р2О5tot. on trilon B from 83.05 tо 64.86% and P2O5wat. : Р2О5tot. from 82.83 tо 8.97%. respectively. Whereas using PAGS with ratio of L:S = 2.5:1 those indicates vary in ranges of 23.72-25.06%, from 90.26 to 71.46%, from 83.92 to 65.30% and from 83.24 to 9.32% respectively, and when L:S = 3:1 they are 27.13-27.94%, from 92.87 tо 73.09%, from 85.93 tо 66.83% and from 85.43 toо 16.51% respectively. Noted that all grades of PAGS as optimal weight ratio PAGS:PRM is 100:25 in which can be obtained enriched superphosphate with high total and acceptable Р2О5 while content of water soluble Р2О5 is no less 50%. Highlights. - the use of phosphoric acid gypsum pulp in the production of enriched superphosphate. - the development is implemented on the equipment of the suprefos production of JSC "Ammofos-Maxam".