Abstract: Abstact:Bacillus thuringiensis（B.t） has been widely used bacause of its specificity for target insects; its low development cost and its environmental compatibility.Much efforts are devoted to the mechanism of action and the enhancement of toxicity.In order to improve the toxicity of endotoxin; various physical and chemical methods are used for strengthening the solubilization; degradation of endotoxin; or the interaction between...;