The method to synthesize 5-aminotetrazoles starting from 1,3-disubtituted selenoureas using ion-supported hypervalent iodine(III) reagent and sodium azide via electrocyclization has been discovered.The reaction has some advantages, such as using green and recyclable reagent [dibmim]+ [PF 6 ] -, environmental benign, short reaction time, good selectivity and high yield.The reaction is in line with the requirements of green chemistry.