The invention discloses a method for preparing edible mushroom liquefied strains. The method comprises three steps, i.e. the purification and culture of primary strains, the preparation of sterilized water and the preparation and liquefaction of secondary strains. According to the method, the primary strains are cultured in a PDA (Potato Dextrose Agar)-enriched culture medium so as to obtain purified primary strains; the purified primary strains are segmented and are then inoculated into a water-soluble culture medium so as to obtain the secondary strains; and hyphae of the secondary strains are broken into pieces by using a high-speed strain crusher, and then, the secondary strains are added to the sterilized water and diluted, thereby obtaining the liquefied strains. The method has the advantages of simple process, simplicity and convenience in inoculation, quickness in strain growth, earliness in mushroom growing, good quality, high yield, high efficiency, low pollution risk, low investment and operating cost and good economic benefit. After the edible mushroom liquefied strains prepared by using the method are inoculated, the permeation of the strains is strong, and the strain growth is quick. Furthermore, the culturing and mushroom growing time of the edible mushroom liquefied strains is greatly shortened, the mushroom growing is orderly, the growing speed is high, and the yield is obviously increased.