The target scale of oil reserve of China had better be set as 120 days of previous net annual input.At this general target,the ratio of public oil reserve and commercial oil reserve may be 3:1.The establishment of China's oil reserve system should be carried out by 3 stages.Before 2010,the system should be established with government reserve as the main body,and commercial reserve as the supplement;during 2010-1015,the system should be established with government reserve and enterprise legal reserve as the main body,and commercial reserve as the supplement;after 2015,China would finally establish the national oil reserve system with government reserve as the leading body,agency reserve as the main body and commercial reserve as the supplement.