Abstract: ; Objective In order to investigate the effects of magnesium hydride microbial organic fertiliser on agronomic traits and soil physicochemical indexes of ginseng, and to provide theoretical basis and technical support for green ecological planting of ginseng. Methods The effects of different levels of magnesium hydroxide microbial organic fertilizers on the seedling retention rate of ginseng as well as the phenotypic traits such as plant height, leaf area and chlorophyll of aboveground parts were systematically investigated by using three-year ginseng cultivars as the experimental materials and setting up four different levels, respectively, 0, 1.25, 2.5 and 5 kg/m², and the fertilizer application rates were denoted as HD-CK, HD-1, HD-2, and HD-3, respectively. Results Mg hydrogenated microbial organic fertilizers promoted the seedling retention rate, plant height, leaf area and chlorophyll of ginseng (P<0.05); the fertilizer treatments significantly increased the content of soil organic matter, total nitrogen, total phosphorus, quick-acting phosphorus and quick-acting potassium, and the effect of soil nutrient enhancement was more significant with the increase of the amount of fertilizer (P<0.05); and the activities of soil urease, sucrase, cellulose and amylase were increased with the increase of the amount of fertilizer (P<0.05). Conclusion Magnesium hydride microbial organic fertilizers can promote soil microbial circulation and soil nutrient cycling; thereby improving soil physicochemical properties and soil enzyme activities, and thus promoting the growth and development of ginseng; HD-2 treatment group had the best growth potential with the amount of fertilizer, and the performance may be attributed to the synergistic biological effects of magnesium hydride and microorganisms.