The invention relates to a ginseng planting technique, in particular to an over-fertilized soil improvement method for ginseng planting on a non-forest land, which includes: planting salt-absorbing crops, crushing and throwing into soil when the crops are yellow and ripe, and ploughing; secondly, planting highland barley and green manure crops, crushing wilted surface parts of the crops in autumn, and returning the crushed parts of the crops into a field; thirdly, increasing available depth of the soil, ploughing the land, continuing ploughing in late April of the next year until bed making, and rendering ultraviolet sterilization; and fourthly, applying organic fertilizer, namely evenly scattering the organic fertilizer from early June and mid-August before bed making, and continuing ploughing the soil until bed making. By the over-fertilized soil improvement method, organics content of the soil is increased, nutrients required by ginseng in growth are met, EC (electrical conductivity) value, organics content and bulk density of the soil are standard, land utilization rate of the land is increased, available types of lands for non-forest ginseng planting are increased, soil guarantee for non-forest ginseng planting is provided, and non-forest ginseng production is benefited.