The construction of arch dams is often affected by severe natural environmental conditions and the complex construction processes which slow construction progress. Construction scheduling simulations provide effective management tools for arch dam construction progress planning. Intelligent construction methods based on the Internet of Things (IoT) have been used in the construction of hydropower stations such as the Xiluodu, Wudongde and Baihetan high arch dams. During these projects, arch dam construction management has gradually evolved from simple manual interactions to intelligent systems. However, the simulation parameters often do not accurately reflect the actual construction state, so the simulation resources do not accurately match the actual conditions and schedule optimization, construction resource allocation, project coupling, and multi-party collaboration can be at very different states. Intelligent scheduling simulations based on the Internet of Things have been developed to improve construction scheduling for high arch dams. Finally, this paper summarizes the key technologies for intelligent schedule simulations and identifies key directions for future intelligent schedule simulations.