Abstract: The question of the escaping families was always a universal existence social phenomenon in feudalism society of China.In the Tang and Song Dynasties,the phenomenon of the escaping families was still very serious,but because the rulers were under the situation of the time,they have transformed the original politics primarily into the economical encouragement primarily in the policy of the escaping families,and have also made the corresponding adjustment in the system of the registration.It was just based on...