The electronic transport properties of a molecular junction based on doping tailoring armchair-type graphene nanoribbons (AGNRs) with different widths are investigated by applying the non-equilibrium Greens function formalism combined with first-principles density functional theory.The calculated results show that the width and doping play significant roles in the electronic transport properties of the molecular junction.A higher current can be obtained for the molecular junctions with the tailoring AGNRs with W =11.Furthermore,the current of boron-doped tailoring AGNRs with widths W =7 is nearly four times larger than that of the undoped one,which can be potentially useful for the design of high performance electronic devices.