Dressing experiment of bronze-bonded diamond grinding wheels using a nanosecond pulsed fiber laser is carried out. The systematic research starts with the mechanism of laser dressing, followed by the analysis of ablated crater impacted by multiple-pulse and the studies of relationship between pulsed laser parameters and ablation effect. The laser dressing experiments is carried out at the foundation of laser ablation and the surface topography after laser dressing on wheels are then observed and assessed by optical microscope and grinding experiment.