Landscape replenishment with reclaimed water is one of the most important ways of sewage recycling, but frequent occurrence of algal blooms is the main bottleneck limiting its utilization. Three preponderant algae species identified from the typical reclaimed water bodies of landscape replenishment were taken as the research objects, and their growth status under the combined effects of temperature, light intensity and concentration of N/P were studied through indoor static experiments. The results show that Microcystis is more likely to become the dominant algae species at T=30 ℃, light intensity=9, 000 lx in low N/P reclaimed water. After only three days of cultivation, the agal density became 91×103 cell/mL compared with 10×103 cell/mL before cultivation, approaching the threshold condition for blooming (10×104 cell/mL); Chlorella vulgaris and Scenedesmus quadricauda like to grow in the raw reclaimed water with T=25 ℃, light intensity divided into 5, 000 lx 7, 000 lx, and relatively high N/P. They reached the threshold of alga bloom within 5 days of cultivation. The reduction of the P concentration can restrain the growth of alga. When the TP decreased from 0.3 mg/L to 0.1 mg/L in the reclaimed water, the inhibitory rates of the two kinds of green alga were 56.6% and 40.7%, respectively; however, the reduction of phosphorus concentration had relatively weak inhibitory effect on Microcystis. The research results give a theoretical support for comprehending the expansion of alga and curbing the outbreak of algal blooms in the reclaimed water bodies of landscape replenishment.