The invention relates to a liquid crystal display panel marking method. The liquid crystal display panel marking method comprises the following steps that a liquid crystal display panel is provided, wherein an information recording part of the liquid crystal display panel comprises a first glass substrate, a metal coating film and a second glass substrate which are arranged in a stacked manner; and a picosecond laser device is adopted for irradiating the metal coating film, and mark patterns are formed. According to the liquid crystal display panel marking method, the picosecond laser device is adopted for irradiating the metal coating film, as the picosecond laser device is short in pulse width, high in peak power and small in heat effect, influences on the glass substrates and a membranecircuit are small, marked contents are more refined and clearer, and identification is easy.