Abstract:The probiotic effect of inulin on earthworms and the formation process of earthworm manure with high vigor were discussed through the experiment of earthworm composting in order to provide theoretical basis for the construction of ecological agriculture, pastoral mode and the remediation of obstacle soil in tidal shoal. Cattle manure, Eisenia foetida and inulin were used in this study as materials to explore the dynamic change processes of cattle manure, earthworm intestinal contents, common earthworm manure and inulin type earthworm manure, respectively, by using pure cattle manure breeding earthworm (EM) and inulin added cattle manure breeding earthworm (IEM). The breeding cycle was lasted for 40 days, samples were taken and analyzed every 10 days. The results showed that the basic properties of inulin type earthworm manure and common earthworm manure formed by the decomposed cow manure with or without inulin were similar: pH tended to be neutral, electrical conductivity decreased significantly, nitrogen was absorbed and utilized, organic matter was accelerated to decompose and mineralize, and phosphorus and potassium were further released. However, the addition of inulin improved the degradation efficiency of organic matter and the release of potassium. After 40 days, the organic matter content of earthworm manure in IEM treatment was 9.4% lower than that in EM treatment, while the total potassium content in IEM treatment was 13.0% higher than in EM treatment. The activities of urease, alkaline phosphatase and catalase in EM treatment increased at first and then decreased, and the peak value appeared on 20-30d. However, IEM treatment shortened the time of peak of enzyme activity (except urease activity), alkaline phosphatase and catalase activities reached their peaks at 10 days, and their values were increased by 113.0% and 61.0% respectively compared with EM treatment. After 10 days of breeding, the microbial diversities of common earthworm manure and inulin type earthworm manure increased significantly, and the number of functional bacteria of inulin type earthworm manure increased multiple times. The addition of inulin increased the relative abundance of Actinobacteria in earthworm manure at the early and middle periods (10 and 20 days), and increased by 40.7% compared with EM treatment at 20 days. In conclusion, inulin can regulate the process of earthworm composting and the properties of earthworm manure. The inulin-type earthworm manure obtained after 20 days of vermicomposting has high biological activity and good quality.