The processes of cathodic reduction of Dy(III) ions to metal in a low–melting LiCl–KCl–CsCl eutectic at the temperature range 623–973 K on molybdenum, gallium and cadmium electrodes in inert gas atmosphere have been studied by non-stationary and stationary electrochemical methods. Reagents without contain impurities of moisture, oxygen and their compounds were used in the experiments. All major operations were performed in a dry box. Cyclic, square-wave voltammetry and open-circuit potentiometry were used to analyze the electrochemical processes. On cyclic voltammogram of the LiCl–KCl–CsCl–DyCl3 molten solution on an inert molybdenum electrode one cathode peak current, corresponding to the deposition of the metallic dysprosium and one anode peak current associated with its dissolution were fixed. The formation of one asymmetric Gaussian cathode peak at a square-wave voltammogram was observed. The number of the exchange electrons of the cathode reaction was calculated from the half-peak width. The obtained value was close to three (n = 2.97 ± 0.04). Using diagnostic criteria, it was found that the process of cathodic reduction of dysprosium(III) ions to metal proceeds irreversibly, in one stage and was controlled by the charge transfer rate. The diffusion coefficients of the complex [DyCl6]3– ions at different temperatures were calculated and the activation energy of the diffusion process was determined. The dependence of the diffusion coefficients of Dy(III) ions vs. the temperature was described by the equation logD=−2.59−1840T±0.02 and obeys to Arrhenius law. The dependence of the apparent standard potential of Dy(III)/Dy couple vs. the temperature was obtained by open-circuit potentiometry. It was described by a linear equation: E_{{{{{\text{Dy(III)}}} \mathord{\left/ {\vphantom {{{\text{Dy(III)}}} {{\text{Dy}}}}} \right. \kern-\delimiterspace} {{\text{Dy}}}}}}^{*} = –(3.701 ± 0.006) + (7.8 ± 0.1) · 10–4T ± 0.004 V. The base thermodynamic characteristics of the formation of dysprosium trichloride from the elements were calculated. It has been established that the electrochemical reaction of dysprosium deposition on active electrodes was associated with the process of alloy formation, which carried out with depolarization. The composition of Dy–Ga and Dy–Cd intermetallic compounds was identified and the reactions of their formation were presented. The influence of the current density on the composition of the cathode product has been studied. The conditions for obtaining intermetallic compounds of a specified composition by electrolysis of a molten LiCl–KCl–CsCl–DyCl3 salt mixture were found.