Abstract: In order to reveal the effect on the diversity of the ants from post-fire forest by different restoring times in arid-hot valleys of Panzhihua,investigations of ground-dwelling ant communities were carried out by pitfall traps in 4 types of plantations in Panzhihua,Sichuan,China.There were four types restoring times as 3 years (H3),6 years (H6),10 years (H10) and 16 years (H16).The results showed:① Ant community composition:1541 individuals were collected,representing 3 sub-families,13 genus,21 species.The H3 plantation included 3 sub-families,7 genus,10 species,the H6 plantation included 3 sub-families,8 genus,10 species,the H10 plantation included 3 sub-families,8 genus,11 species,the H16 plantation included 2 sub-families,5 genus,9 species.The most abundant species were Paratrechina sp.1 and Monomorium chinensis.② Ant abundance of different communities showed as follow:H10>H6>H3>H16.The ant abundance of H3 and H10 were significantly different from H16 plantations;species richness showed as follow:H6>H10>H3>H16.Ant species richness of H6 and H10 were significantly different from H16.③ Community structures:Ant community structure could be divided into 3 groups among the 4 plantations,first group was ants from H10 plantation,second group was ants from H16 plantation,and the third group was from both H3 and H6 plantation,which showed relatively similar structure.④ Correlation analysis:there were positive correlations between ground-dwelling ant abundance,species richness and plant abundance,species richness.There were negative correlations between ground-dwelling ant abundance,richness and plant coverage.The results indicated:0—6 years after post-fire was the beginning stage of ant community restoring,6—10 years after post-fire was the key stage of ant community restoring and succession,10—16 years after post-fire was the stable stage of ant community restoring.The restoring of ground-dwelling ant community had positive relationship with habitats,and human disturbance controls the change of habitats,so it is feasible to raise biodiversity level by improving the habitats.