A method for obtaining liquid crystal display charging ratio, comprising: Step S1: providing an LCD; and Step S2: measuring V-T curve of the LCD, a voltage corresponding to a peak of the V-T curve being a data signal voltage (V data); wherein the method is characterized in that the method further comprises: Step S3: lighting up heavy-duty image and light-duty image of the LCD according to a same grayscale respectively, measuring and recording actual display brightness of the heavy-duty image and the light-duty image; Step S4: computing a ratio between the actual display brightness of the heavy-duty image and the actual display brightness of the light-duty image; Step S5: using the ratio between the actual display brightness of the heavy-duty image and the actual display brightness of the light-duty image as a ratio to find and mark a measure point on the V-T curve forming the ratio with the peak, voltage corresponding to the measure point being peak value (V pixel) of pixel voltage; and Step S6: computing the LCD charging ratio according to the peak value (V pixel) of pixel voltage and data signal voltage (V data); C Ratio = V pixel / V data × 100 %; wherein C Ratio being LCD charging ratio, V data being the voltage of the data signal, and V pixel being the peak value of pixel voltage; wherein the heavy-duty image comprises a single-color red image, a single-color green image, and a single-color blue image, and wherein the light-duty image is a white image. Step S1: providing an LCD; and Step S2: measuring V-T curve of the LCD, a voltage corresponding to a peak of the V-T curve being a data signal voltage (V data); wherein the method is characterized in that the method further comprises: Step S3: lighting up heavy-duty image and light-duty image of the LCD according to a same grayscale respectively, measuring and recording actual display brightness of the heavy-duty image and the light-duty image; Step S4: computing a ratio between the actual display brightness of the heavy-duty image and the actual display brightness of the light-duty image; Step S5: using the ratio between the actual display brightness of the heavy-duty image and the actual display brightness of the light-duty image as a ratio to find and mark a measure point on the V-T curve forming the ratio with the peak, voltage corresponding to the measure point being peak value (V pixel) of pixel voltage; and Step S6: computing the LCD charging ratio according to the peak value (V pixel) of pixel voltage and data signal voltage (V data); C Ratio = V pixel / V data × 100 %; wherein C Ratio being LCD charging ratio, V data being the voltage of the data signal, and V pixel being the peak value of pixel voltage; wherein the heavy-duty image comprises a single-color red image, a single-color green image, and a single-color blue image, and wherein the light-duty image is a white image. wherein C Ratio being LCD charging ratio, V data being the voltage of the data signal, and V pixel being the peak value of pixel voltage; wherein the heavy-duty image comprises a single-color red image, a single-color green image, and a single-color blue image, and wherein the light-duty image is a white image.