In regard to temperature control and crack prevention for concrete dams in plateau areas with high elevation and large temperature differences, a summary was made of research on concrete crack prevention during the construction of the first large concrete gravity dam, with a height of more than 100 meters, in the Tibet Autonomous Region. Based on on-site monitoring data during the dam construction for the Zangmu Hydropower Station, dynamic feedback simulation analysis technology was used to demonstrate the real working condition throughout the construction period. Then, risks that may occur during the later construction period were predicted according to the simulation results, and the related standards and measures for temperature control and crack prevention were adjusted and optimized.