We performed polarized photoluminescence (PL) experiments in the quantum Hall system of II-VI semiconductors, Cd1-xMnxTe/CdMgTe single quantum well at steady magnetic fields up to 25T. The evolution of the spectra with changing Mn concentration x was investigated. In CdTe/CdMgTe quantum well (x=0), the oscillatory behaviors of the PL due to the many-body effect were observed at the integer filling factor clearly. In the lower Mn sample, the effective g-factor of electron was tuned to nearly zero and the PL was polarized in σ+ polarization because of the gigantic Zeeman splitting in the valence band. The observation of the Auger and spin-flip recombination processes around n∼3 supports this situation. In the higher Mn sample, the PL is also highly polarized in σ+ polarization due to the large Zeeman splitting of both the conduction band and the valence band. The sudden shift of the PL energy was observed at the filling factor v=1 only for the higher Mn sample. © 2001 Elsevier Science B.V.