Damping capacities of the common used AZ31 and ZK60 alloys were studied under the frequency 10 Hz,the strain from 9.6×10~(-5) to 1.45×10~(-2) at the room temperature. The results show that damping properties of magnesium alloys can be analyzed by G-L model. Refining grain and increasing precipitation phases can block the dislocation movement,which reduces the damping properties. The damping properties of AZ31 alloy are better than those of ZK60 alloy. Damping-strain curves of different hot processed AZ31 an...