An optical correction method applied to VRR TFT LCD panel was proposed. Based on the influence of timing and voltages （V_GH/V_GL/V_COM） on the VRR TFT LCD panel optics， the two parameters were optimized. T-Con ACC optical compensation function could be used to correct the optical data differences between minimum rate and maximum rate，thus reducing the optical fluctuation of the panel during the refresh rate. The experimental results showed that the VRR TFT LCD panel showed better optical performance after optical correction.