The invention discloses a preparation method of turbid lotus root juice. The method comprises the following steps: preprocessing raw materials, slicing, performing color-protecting, performing paste-forming, pulping, centrifuging, blending, finely filtering, and sterilizing. The method is simple, safe and reliable; the lotus root juice is good in stability and excellent in mouth feel, and does not have the astringent taste; lotus root resources can be fully utilized, the added value of louts roots is improved, and the development of the lotus root industry can be facilitated.