Abstract : The objective of this study is to investigate the thermal resource condition s in the Nan ming Dam Area of Jian he county , Guizhou province , facilitate agricultural industrial structure adjustment in this area , enhance the utilization efficiency of land and climate resources , and increase production , income and efficiency. Based on nearly 14-year daily meteorological observation data from the Nan ming Dam automatic weather stations , the five-day moving average method is used in this study to determine the first and last dates for temperature thresholds ofo ℃ , 5 ℃ , 10 c , 15 ℃ , and20 ℃ , thereby defining the growing seasons for various crops in this area. The accumulated temperature method is applied to calculate the thermal resources in the dam area and study the thermal requirements for the growth and development of various crops. The results show that the Nan ming Dam Area is suitable for farming all the year round. During the farming season , the active accumulated temperature of ≥ 0℃ is 5 921. 6 ℃ · d, indicating relatively abundant thermal resources. The frost-free period is 285 days on average , providing along crop growing season. In80% of years , the period with daily average temperatures ≤5 ℃ start s on November 26 and lasts until the following March 6. cool-season crops experience a slow growth period of about100 days in winter , during which they can accumulate active temperature ≥5℃ of approximately5539.2 ℃-d ,showing abundant thermal resources. The suitable growing period for warm-season crops exceeds 175 days , and in 80% of years , they can accumulate an active accumulated temperature of ≥10 ℃ more than4900℃ - d. The thermal resource s in the Nan ming Dam Area belong to the mid-to-high level in Guizhou province. The Nan ming Dam Area has abundant thermal resources , making it suitable for one-year double-cropping or multiple-cropping planting modes , such as the early rice to late rice to vegetables , the rice to rapeseed , the rice to wheat , the rice to edible fungi , the corn to vegetables to potatoes , and the coarse cereals (legumes) to vegetables. These modes can increase the cropping index , enhance the utilization efficiency of climatic resources , and ultimately achieve the goals of increasing income and efficiency.