  \'Eliashberg theory generalized to the case of the electron-phonon (EP)
systems with the not constant density of electronic states, as well as to the
case of the frequency dependent renormalization of both the electron mass and
the chemical potential, is used to study hydrogen sulphide phase under
pressure. The frequency and the temperature dependences of the electron mass
renormalization ReZ , the density of electronic states , renormalized by the EP
interaction , the spectral function of the electron-phonon interaction,
obtained by calculation are used to calculate the electronic abnormal GF. The
generalized \'Eliashberg equations with the variable density of electronic
states are resolved for the hydrogen sulphide phase under pressure. The
dependence of both the real and the imaginary part of the order parameter on
the frequency in the phase is obtained. The results of the solution of the
Eliashberg equations for the Im-3m (170 GPa), Im-3m (200 GPa), Im-3m (225 GPa)
and R3m (120 GPa) hydrogen sulphide phases are presented. The value in the
hydrogen sulfide phase at the pressure P = 225 GPa has been defined. The value
for the hydrogen sulfide phase at the pressure P = 170 GPa has been predicted.
