Soil water-holding agent is a kind of material for water saving developed in recent years.The agents of LT 200, LT-100(made in San-yan Ind ust rial Company, Japan), Huang-guan and Bo-ya were tested in field experiments to study the effects of different soil water-holding agents on spring wheat plant, tree transplant, and tree seeding raising.Results showed that in the experiment of spring whea t plant, LT- 200, LT-100, H uangguan and Boya increased yields by 13.60%, 11.43%, 4.13%and 3.52%, respectively, with the average of 8.17%.They increased water use eff iciency by 1.00, 0.84, 0.31 and 0.26 kg/ mm ? hm², respectively, compared with controls(field without adding soil water-holding agents).Especially, the increases by adding LT-200 and LT 100 agents were significant. At same time, LT-200, LT- 100, Huangguan and Boya enhanced soil water storage in 120 cm depth by 27.64, 26.92, 14.04 and 13.82 mm, respectively, compared with cont rols in spring wheat planting experiment.Soil water-holding agents couldincrease the dry root weight of spring wheat, but the increases were insignificant.Effects of different soil water-holding agents on tree transplant and tree seeding raising in one year growth were limited.Applied methods and the amount of soil water-holding agents added to soil need further studies.