The methods of the thermal analysis are useful for studying physical and chemical properties of coordination compounds. In this work we are using thermal analysis data to describe the composition, thermal stability and the way of decomposition of a new series of copper(II) dithiocarbomethoxyhydrazone coordination compounds, namely [Cu(H2L)X]Solv, where X=Cl, Solv=H2O (1), dmso (4); X=Br, Solv= 0.5C2H5OH (2), dmso (5) and [Cu(HL)Solv] where Solv= H2O (3), dmso (6), dmf (7), some of which were characterized structurally [1]. The combined thermal analysis (TG-DTG-DTA) of the compounds were performed in the temperature range 20- 1000oC in air atmosphere with a heating rate of 10 o /min. The thermal decomposition takes place in several stages, for all compounds. In the temperature range of 20-250 °C, one (1-5) or some (6, 7) endothermic effects are observed, which, from the mass loss are attributed to the elimination of external or internal solvent molecules: H2O -3.8% (1), 4.0% (3); 1/2C2H5OH - 4.7% (2); DMSO - 17.81% (4), 13.89% (5), 12.95% (6) and DMF - 13.84% (7). In the temperature range of 250-800 oC, a series of exothermic effects related to the gradual burning of hydrazone ligand follows. The final decomposition temperature of the investigated compounds is: 840 (1), 780 (2), 810 (3), 780 (4), 790 (5), 780 (6), 778 oC(7). The TG, DTG decomposition profiles of the complex 7 and 6 (structurally characterized) are similar and show quite high temperature of decomposition beginning at 180- 200oC (fig. 1a), corresponding to the elimination of dmso and dmf internal molecules, respectively, and suppose a similar structure for these compounds. Compared to those, 1-3 species of complexes, synthesized in alcohol medium, show very week endothermic effects in the region up to 50-70oC (fig.1b). Thermal analysis data for complexes 1-7 are in agreement with elemental and X ray data analysis and suggest the proposed composition.