Climate change in form of the rainfall pattern transformation has disrupted the different dimensions of the countries national security. Meanwhile, increasing the temperature and reducing the rainfall in those of countries where located on the world desert strip, have had the most impacts on environmental security especially their food production and security. The available date in our country shows that groundwater levels have been decreased because of changing the rainfall pattern during two recent decades and increasing the water consumption. In between, increasing the temperature and decreasing the rainfall during two past decades has had the great impact on the central catchment area. This study focuses on the analyzing the effect of climate change on the food security in the jeroft city. This article with its functional nature is based on this mean hypothesis that food security in this part of country is effected by climate change in form of transforming the rainfall pattern especially increasing the temperature and decreasing the rainfall. The methodology of this text is descriptive- analytical. Its data have collected by library method and analyzed by statistical software R. The result of the study showed that climate change has a positive and significant effect on food security in southern Kerman province with a significant level of 99%.