In order to realize the simulation of the filling progress of core walls in ultra-high core rockfill dams in high-altitude area, the influences of material supply for warehouse surface construction, meteorological characteristics of high-altitude area, and construction parameters of warehouse surface on the construction progress of core wall filling were comprehensively considered. A simulation model of the core wall filling progress of ultra-high core rockfill dams in high-altitude area with self-adaptive adjustment of simulation parameters of meteorological forecast, material supply intensity, and construction machinery configuration, etc. was established. The simulation model was applied to filling progress control of the core wall of an ultra-high core rockfill dam. The results show that the deviation between simulation results and the actual construction progress is 2.17%, which is more in line with the actual construction situation than those of the traditional simulation method, and the model can be used for on-site simulation analysis of construction progress. Keywords: ultra-high core rockfill dam; self-adaptive control theory; progress simulation; meteorological forecast; high-altitude area 〖FL