In this paper, finite length 558 grain boundaries (GBs) with different edge configurations are introduced in armchair graphene nanoribbons (AGNRs). By using first-principles calculations, the variations of electronic and magnetic properties with two adjustable parameters W(ribbons widths) and N-z (the distances between neighboring 558 GBs) are investigated for each group. The impurity states introduced by 558 GB have a dominating effect on AGNRs. Different transitions of the electronic and magnetic phases with W and N-z occur for different groups. Furthermore, a ferromagnetic ordering between the two zigzag chains of 558 GB appears for the ferromagnetic systems. (C) 2015 Elsevier B.V. All rights reserved.