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\'Eliashberg theory, being generalized to the electron-phonon (EP) systemswith not constant density of electronic states, as well as to the frequencybehavior of the renormalization of both the electron mass and the chemicalpotential, is used to study hydrogen sulphide phase under pressure. The phononcontribution to the anomalous electron Green's function (GF) is considered. Thepairing is considered within the overall width of the electron band, and notonly in a narrow layer at the Fermi surface. The frequency and the temperaturedependences of the electron mass renormalization ReZ , the density ofelectronic states , renormalized by the EP interaction , the spectral functionof the electron-phonon interaction, obtained by calculation are used tocalculate the electronic abnormal GF. The \'Eliashberg generalized equationswith the variable density of electronic states are resolved. The dependence ofboth the real and the imaginary part of the order parameter on the frequency inthe phase is obtained. The value in the hydrogen sulfide phase at the pressureP = 225 GPa has been defined.

Metal hydrogen sulfide critical temperature at the pressure 225 gpa