In order to investigate potato growers' behaviors of adaptation to climate changes and its influence factors in Dingxi City, Gansu Province, a bivariate-probit model was used to empirically analyze 362 potato growers' behaviors of positive and passive adaptation to climate changes. The results showed that: Farmers' age, whether to participate in the technical training, whether suffered from natural disasters, agricultural loan availability significantly promoted their adaptive behavior of climate changes, while distances from markets to village and district displayed negative impact; The main factors, which affected whether farmers adopted passive adaptive behavior of climate changes or not, were the proportion of labor force in the family labor force, the influence of natural disasters and agricultural loans availability. Concerning the marginal effect, agricultural loans availability could help farmers to adapt to climate changes.