The results of gas current calculations in a flow part in not reversive jet-reactive turbine at pressure upon an input to the turbine up to 10 МPа (earlier calculations were spent up to 0.9 МPа), executed in program complex FlowVision for the first time are presented in the article. The dependences of factors and parameters of efficiency of the jet-reactive turbine (JRT) from total pressure upon an input in the turbine are received. They are exposed in a graphic type. The primary goals of the research were: calculation of parameters of current of gas in a flow part of the jet-reactive turbine by means of program complex FlowVision at pressure upon an input of the JRT from 0.4 up to 10 МPа, the analysis of results of calculation, reception of dependences of different factors from total pressure upon an input in the turbine. The Influence of total pressure on an input in the JRT on various factors, such as: total pressure recovery factor, factor of hydraulic resistance and factor of outflow were investigated. It was discovered that total pressure recovery factor  increases for 27 % at an increase of pressure of an input of the jet-reactive turbine up to 4 МPа. It was determined that the hydraulic resistance factors related to the dynamic pressure at the inlet ξin and the turbine output ξout is reducing at 2.7 and 3.3 times, respectively, with an increase in pressure at the inlet of the jet- reactive turbine to 4 MPa.