The invention belongs to the technical field of drinks and discloses fermented soybean milk, fruit juice soymilk and a preparation method of the fermented soybean milk and the fruit juice soymilk. The method comprises the following steps of: preparing raw soybeans, sequentially performing sorting, washing, soaking, cooking, beating, separating and filtering treatments on the raw soybeans, homogenizing, sterilizing, cooling to the temperature of 40-45 DEG C, and adding lactic acid bacteria and milk sugar for fermenting in 12-16 hours to obtain the fermented soybean milk; and on the basis of taking the raw soybeans, the lactic acid bacteria, the milk sugar, sugar, a thickening agent, a sweetener, milk, nattokinase, fruit juice, acid, buffer salt, essence and water as raw materials, preparing the fermented soybean milk, mixing, performing a constant volume process, blending, homogenizing, sterilizing and cooling to obtain the fermented soymilk. According to the invention, the amount of the soybean beany flavor in the product is reduced by 80-90%, the fruit juice is added to the soybeans so as to complement each other and enable the taste to be blander and delicate, in addition, the nattokinase is added to the soymilk, so that the nutrition of the product can be improved; the product can be placed at a room temperature for 6 months with stable state, no bleeding and a deposition rate of less than 1%.