The invention relates to the technical field of LCD production, and particularly discloses an LCD technique. The technique comprises the steps of S1, preprocessing: cleaning for the first time, photoresist spreading, exposure, developing, hardbaking, etching, demolding and cleaning for the second time are sequentially conducted after raw material inspection is conducted to obtain an ITO glass substrate; S2, orientation layer spreading and PI curing: orientation layer spreading and powder spraying are completed before curing is conducted, and curing is conducted to obtained the cured ITO glasssubstrate; S3, post processing: PI rubbing, silk screening, heat pressing, cutting, granulating, liquid crystal filling and sealing are sequentially conducted on the cured ITO glass substrate, and theinitial production of an LCD display screen is completed after cleaning is conducted; S4, finished product processing: detecting, outer screen printing and patching are conducted on the initially produced LCD display screen, and the LCD display screen is finally packaged and put into a warehouse.