Abstract:In the context of global warming, the degree of regional drought has intensified, which has seriously limited the growth of trees in arid and semi-arid areas. The Antaibao mining area is located in the agro-pastoral ecotone of China. The ecological environment is fragile and sensitive to climate change. Based on the method of dendrochronology, the standard chronology of tree-ring width of Robinia pseudoacacia forest in Antaibao coal mine reclamation area was established. The analysis of tree-ring climate response shows that water is the main factor limiting the growth of R. pseudoacacia in the study area. The precipitation in the hydrological year from September to August of the previous year and the precipitation in the main growing season ( June-August ) plays an important role in promoting the growth of trees, but the precipitation in September of the current year has a limiting effect. The higher temperature in the winter before the growing season ( December and January ) is also an important factor limiting the radial growth of R.pseudoacacia.