Large LNG storage tanks can be damaged easily when subjected to strong earthquakes. If the leakage occurs due to structural damage or excessive liquid shaking amplitude, it will lead to a series of secondary disasters, resulting in catastrophic economic losses and social impacts. The occurrence of ground motion is highly random. At present, most of the time-history analysis of LNG storage tanks adopts classical ground motion records, which cannot be guaranteed to match the focal mechanism and site characteristics. Deterministic ground motion records are adopted, and the consideration of non-stationary random characteristics of ground motion is not perfect. To study the failure mode of LNG storage tank under earthquake action, evaluate the ability of LNG storage tank to complete the predetermined function in a probabilistic sense, and study the seismic reliability of LNG storage tank have important theoretical significance and guiding value for engineering structure decision, design and evaluation.