Employing the high insecticidal active compound Ⅴj which was found in our previous work as a leading compound, 19 benzoyl urea compounds containing 5-aminothiazole ring have been designed and synthesized (yield: 81.4~95.8%) by introducing different substituent to the 2-position phenyl of thiazole ring. The structures of all these compounds were confirmed by 1H NMR and 13C NMR. Preliminary results of in vitro insecticidal activity test showed that all the title compounds displayed certain insecticidal activity at the concentration of 600 mg/L (W/W). Among them, compounds Ⅵ i ~ o showed 100% lethal activity against armyworm, Besides, three compounds Ⅵ k,Ⅵ m and Ⅵ n also exhibited 100% fatality rate against cotton bollworm and corn borer.