Laser conditioning is a new technology to enhance laser damage threshold of the optical coatings. The method of the small laser spot scanning and raising of energy step by step is applied to condiation several various multi-layer reflective coatings. It is found experimentally that the damage thresholds of the reflection coatings, except of HfO2/MgF2 multi-layer coating, such as zero-probability damage threshold F0%, minimum damage energy density FDmin, maximum not damage energy density FNDmax and 50% probability damage threshold F50% are all enhanced. It means that laser conditioning technology not only can eliminate the impurities and defects in the coating, but also can improve the whole properties of the coating.