The influence of the depolarization effect on the optical rectification in electric-field-biased GaAs quantum well is studied using relaxation time approximation and a compact density-matrix approach. The results obtained show that the depolarization effect shifts the position of the resonance peak. For three different bias fields, F=3×104 V/cm, 4×104 V/cm, 8×104 V/cm, the peak position is ?ω=108.48 meV, 108.92 meV, 111.99 meV, respectively. The shift of the peak position is 5.96 meV, 5.99 meV and 6.28 meV, respectively, which increases with the bias field.