Superselective pseudo-Continuous Arterial Spin Labeling (SS-pCASL) suffers from low labeling efficiency due to B1 inhomogeneity at 7T. An enhanced SS-pCASL using parallel transmission with B1 phase shimming was proposed. B1 phase shimming algorithm was designed to penalize low and high B1 amplitude in the labeled and unlabeled ICA, respectively. B1 amplitude was increased by 40% for the labeled ICA and decreased by 90% for the unlabeled ICA. Simulation and in-vivo results demonstrated that enhanced SS-pCASL improved labeling efficiency for the labeled ICA and suppressed labeling oscillation for the unlabeled ICA.