With its clean, low-carbon, high energy density and renewable characteristics, hydrogen energy has become a strategic energy carrier to promote the deep decarbonization and structural transformation of the global energy system. As a key hub connecting upstream hydrogen production and downstream hydrogen use in the hydrogen energy industry, liquid hydrogen storage and transportation is an important feasible path to support large scale, cross-regional and low-cost applications of hydrogen energy. Based on global patent data, this article specifically analyzes the patent application trend, geographical distribution, main applicants and technology efficacy in the field of liquid hydrogen storage and transportation technology, studies the innovation trend of liquid hydrogen storage and transportation technology, and further supports the hydrogen energy industry.