Influence of meso-fauna and micro-fauna composition on soil nutrient dynamics in reclaimed soil in copper tailings is studied by pot experiments. The pot experiments in laboratory were constructed consisting of mineral soil and litter: taken from a reclaimed site with naturally developed vegetation (Imperata cylindrica (Linn.) Beauv).The litter were inoculated with four different types of decomposer community: 1. Remove soil fauna(Re), Remove soil fauna+Litter(Re+Li), 2. Collembola(Co), Collembola+ Litter(Co+Li), 3. Collembola+ Acarina(Co+Ac), Collembola + Acarina + Litter(Co+Ac+Li), 4. Mesofauna(Remove soil macrofauna Me), Mesofauna + Litter(Me+Li). A group of Control Check (CK) treatment was set up, which will be completed before cultivation experiment, it will be compared with after-cultivating soil nutrients. Under the composition of different meso-fauna and micro-fauna and their interaction with litter, their effects on the soil pH, organic matter, total phosphorus, total nitrogen, available phosphorus and hydrolysable nitrogen were anslyzed. Results indicated: soil pH value will decrease with the increase of meso-fauna and micro-fauna group, the lowest is in Me treatment and Me+Li treatment, there is no significant impact between them. Nutrient content under CK treatment is significantly lower than those in other treatments. The highest content of organic matter, available phosphorus and hydrolysable nitrogen are in Me+Li treatment, and extremely significant difference was appeared between CK treatment and the other treatments P < 0.01. The highest content of total phosphorus is in Re and Me+Li treatment and the lowest is in Co+Li treatment, and significant difference is appeared between them P < 0.05. The highest content of total nitrogen is in Co+Ac and Me+Li treatment and the lowest is in Co+Ac+Li treatment, also there appear significant difference P < 0.05. And correlation analysis indicates that the correlation between organic matter and available phosphorus is closely positively correlated (r=0.886); total nitrogen and hydrolysable nitrogen (r=0.898) shows significantly positive correlation; organic matter and total nitrogen and hydrolysable nitrogen show a significantly positive correlation (r=0.735, r=0.780); total nitrogen and available phosphorus (r=0.782), available phosphorus and hydrolytic nitrogen (r=0.755) also show significant positive correlation. Organic matter and pH have a closely negative correlation (r=-0.782), and there was no correlation between total phosphorus and organic matter, total nitrogen, available phosphorus, and hydrolysable nitrogen. Through, analysis of the research, it can further reveal that type of composition of meso-fauna and micro-fauna can make the greatest contribution to the development of soil nutrient. And it can reveal the changes of the largest contribution ability groups under different nutrient indicators. It can provide evidences for the returning of soil nutrients in reclaimed soil in copper tailings and the ecological reconstruction.