Anion exchange membrane fuel cells (AEMFCs) have attracted a growing interest as an alternative for proton exchange membrane fuel cells (PEMFCs). AEMs are the most important components of AEMFCs, and it’s a great challenge to attain high ion conductivity, good dimensional, mechanical and alkaline stabilities for AEMs. We prepared poly(ether sulfone ketone)s having various hydrophilic-hydrophobic block ratios, and investigated the effect of the block composition on the chemo-physical properties of the corresponding membranes. The experimental procedures and the properties, including conductivity, morphology and stability will be discussed in detail.