Asoneofthefinancingmethodsof SMEs，thesetbondsareattractingincreasingattentions.This articlediscussthemainbarriers attheissuingstageofsetbonds andsuggests，onthestudyofthecurrent setbonds guaranteemode，thatanupordownstreambigenterprisebeintroducedtothefirst-levelguaran-teestageorbondinsurancecompanies besetuptoenhancetheguaranteecompanies as setbondguarantor.