Abstract:The elephant nose ridge hydropower station is located on the Niu Leng river at the junction of Weining County, Guizhou province and Huize County of Yunnan province. The dam height of the reservoir is 141.5m, the RCC project is 819 thousand and 300 m3, and it is located in the warm temperate plateau monsoon climate, which is influenced by the monsoon, topography and low latitude. The dam of the elephant trunk hydropower station is the second high RCC Double Curved Arch Dam in the world. The dam has the characteristics of large scale, high technical content and high construction requirements. The temperature control problem of RCC dam is very prominent, and becomes the key of quality and schedule control. The hydrometeorological conditions, engineering construction characteristics and the temperature control standard of the RCC of the dam are studied in order to prevent the occurrence of the harmful cracks in the building. The temperature control construction technology of the roller compacted concrete is systematically studied. The concept of temperature control of the traditional roller compacted soil is broken through, and the optimization of concrete matching is boldly used. The temperature control of RCC is carried out by new technology and new technology, such as ratio, lowering the entry temperature, water cooling, video monitoring and so on. The good temperature control effect is obtained, which makes the construction quality of RCC more reliable, and provides reference and guidance for similar projects.