Abstract: Tujia village surrounding Laosicheng ruins,centering on this ancient city,has formed a set of "professional" division and cooperation system in the fields of  military,economy,culture and so on,which served as the city’s military defense,geopolitics,economic needs and cultural guidance.This system revealed the core military,political and cultural status of Laosicheng ruins in TuJia village.

Key words: Laosicheng ruins,Tujia village,the Peng&rsquo, s Tusi