VO 2+ ions doped ZnS-CdS composite nanoparticles have been synthesized by chemical precipitation method. The prepared sample was investigated by different spectroscopic techniques such as optical absorption (UV-Vis) and Electron Paramagnetic Resonance (EPR) studies. The results and analysis reveal that site the VO 2+ ion occupied in octahedral symmetry with tetragonal compression having (C4v) symmetry in the host lattice. Optical absorption spectrum showed characteristic bands corresponding to

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... d ↔ d) transitions and the corresponding band gap energies are calculated. The evaluated crystal field and parameters are Dq = 1757, Ds = -2652 and Dt = 1111 cm -1 , g|| = 1.90, g⊥ = 1.98, A|| = 2.11 x 10 -4 , A⊥= 41.38 x 10 -4 cm -1 .