In order to better help domestic shipyards meet the requirements for steel plate pretreatment of Liquefied Natural Gas (LNG) ship, based on the construction experience of LNG ship, the raw material requirements, quality requirements, first piece testing requirements, and control measures of influencing factors for steel plate pretreatment of LNG ship are summarized, which can provide technical support for domestic shipyards to improve the construction efficiency and quality of LNG ship.