The invention relates to a liquid crystal screen detection method. The liquid crystal screen detection method comprises the steps that standard images are stored, wherein the standard images are at least two of a full screen image, a first screen image and a second screen image determined in a beforehand experiment under the condition that no error welding exists; the image output by all pins is defined as the full screen image, the image output by only part of the pins is defined as the first screen image and the image output by only the rest part of the pins is defined as the second screen image; for a liquid crystal screen to be detected, images to be detected are obtained, and the images to be detected are at least two kinds of images corresponding to the standard images; the images to be detected are subjected to comparison with the standard images, if each kind of the corresponding image shows the same, the liquid crystal screen is free of a welding error, and if not, the liquid crystal screen has the welding error. By means of the liquid crystal screen detection method, the quality of the liquid crystal screen can be judged accurately, and the detection efficiency is greatly improved.