Influence of tourism on society,economy and culture of traditional villages is shown gradually by physical form,promoting the evolution of villages into small towns. Based on the perspective of morphology,the changing features of physical and social spatial form of three typical regions(Xizhou Village and its surrounding areas,Zhoucheng Village and its surrounding areas,and Renliyi Village) in Xizhou Town of Dali City during 1985-2010 were analyzed; the roles of tourism during the evolution process of villages into small towns were discussed; the evolution features of villages into small towns were summarized. It is concluded that tourism and economy related to tourism have played important roles in the enhancement of cohesion degree of an aggregation nucleus and have promoted the evolution process of vilages into small towns. Influence of tourism on society, economy and culture of traditional villages is shown gradually by physical form, promoting the evolution of villages into small towns. Based on the perspective of morphology, the changing features of physical and social spatial form of three typical regions (Xizhou Village and its surrounding areas, Zhoucheng Village and its surrounding areas, and Renliyi Village) in Xizhou Town of Dali City during 1985-2010 were analyzed; the roles of tourism during the evolution process of villages into small towns were discussed; the evolution features of villages into small towns were summarized. It is that that tourism and economy related to tourism have played important roles in the enhancement of cohesion degree of an aggregation nucleus and have promoted the evolution process of vilages into small towns.