Abstract: The insecticidal Bacillus thuringiensis(Bt)cryIAc gene was used to transform the cotyledon explants of pepper via Agrobacterium transformation.Through stringent selection of kanamycin,analysis of the expression of GUS in the plants by histochemical method,molecular biological assays with PCR and Southern dot hybridization,it is confirmed that the cryIAc gene was integrated into the genome of pepper.