Fly ash, as a kind of solid waste, attracts increasing attention in the recent years. In this paper, the stress-strain and leaching behavior of fly ash and chelating fly ash under various moisture contents were studied. According to the test results, moisture content, curing conditions have significant effects on the compressive strength, failure strain. The heavy metals leaching from fly ash can almost meet the requirement of environment. The strength of fly ash and chelating fly ash rise with the increase of curing time, while the failure strain decreases at earlier period. In the later period of curing time, the compressive strength exhibits different trend, by which the strength of fly ash in curing boxes is about 23.11 times of the chelating fly ash. Among them, the strength of fly ash increases with the decrease of water content under different curing conditions, due to the influence of pore water on the absorption and structure of compaction energy; in addition, the strength of chelating fly ash in curing boxes increases with the increase of the curing time and water content.