Selective laser sintering (SLS) is a kind of additive manufacturing technology. A large amount of powders are not sintered during the SLS forming of polyamide 2200 (PA2200), and the reuse of the unsintered powders is important for reducing the cost. However, the high temperature during the SLS process changes the performance of unsintered powders, and the effect of powder recycling on the properties of the formed samples is not yet clear. The influences of powder recycling times on hardness and impact toughness of the sintered samples are systematically investigated with the help of EOS P110 system and EOS PA2200 powders. The results show that the melting point of the recycled powders increases with the increase of recycling times of the powders. When the recycling times exceeds two, the unmelted powders and pores inside the formed samples increase, and the toughness and hardness of the formed samples decrease. When the recycling times of powders is less than two, the impact toughness of the formed samples declines slightly and its hardness increases.