Sha•Su is the pesticide prepared by monosultap and bacillus thuringiensis. Monosultap is a kind of artificially synthesized nereistoxin similarity, when it enters the bodies of pests, it will be quickly converted into nereistoxin or dihydronereistoxin. The product is a competitive inhibitor of acetylcholine and has better effects of contact poison, stomach toxicity and uptake and translocation. The bacillus thuringiensis in alkaline mid guts erodes cellular tissues of intestinal walls, causes intestinal tracts paralyzed in several minutes, makes the pests stop eating, quickly damages the inner membranes of intestinal tracts, and the bacillus thuringiensis enters hemolymph tissues to cause septicemia, so that the pests are died due to hunger and septicemia. Meanwhile, the bacillus thuringiensis can inhibit RNApolyase relying on DNA when pests are in ecdysis and metamorphosis. The product is commonly used for cruciferous vegetables diamondback moths and rice stem borers.