In view of the coring problem for the China-led IODP349、367、368/368X voyage， through analyzing the coring data， the coring tools and factors affecting the core recovery， core quality and cored efficiency in sedimentary rock and hard rock are researched， the causes and degree of the influence factors such as lithology， technical tools and external environment etc. which affect the ocean drilling coring are classified and summarized. The corresponding improvement measures are put forward.