Effects of slow/controlled-release fertilizer cemented and coated by nano-materials on crops were studied through experiments of germin- ation of wheat seed, emergence of seedlings, growth in seedling stage, yield and nitrogen leaching. It was found that four kinds of water solution of nano-submicron composites were safe to germination of wheat seed, emergence of seedlings and growth in seedling stage, so were the slow-release fertilizers coated and cemented by four kinds of water solution of nano-submicron composites. Results of leaching experiment showed that nitrogen release rate of fertilizer coated by plastics-starch composites was the lowest, and the tendency was that nitrogen release rates of coated slow-release fertilizers were lower than that of cemented slow-release fertilizers. Results of potted wheat showed that the yield increased by bulk blended slow-release fertilizer according to the requirement of nutrients in different growth seasons was higher than that of single slow-release fertilizer. Results of measurements on nutrients of wheat plant showed that in treatments with the five kinds of bulk blended slow-release fertilizers, the contents of NPK absorbed by wheat in shooting period were higher than that of chemical fertilizer of equal amount of NPK, which was consistent with the rule of nutrients demanded by wheat.