The invention relates to a preparation method of a ginseng micro-powder tablet. The method includes the following steps of selecting raw materials, conducting drying, sterilizing, freezing grinding, dry granulating and tabletting, and obtaining the ginseng micro-powder tablet. The invention further provides the ginseng micro-powder tablet prepared through the method. The ginseng micro-powder tablet is attractive in appearance and low in surface pitting rate and fracture rate, and the hardness, the disintegration degree and friability of the ginseng micro-powder tablet meet the requirements for tablet quality. According to the method, the extraction process is omitted, a large amount of ethyl alcohol for extraction solvent can be saved, the production cycle is greatly shortened, and production cost can be greatly reduced. Most importantly, all natural ingredients of ginseng are kept.