The invention discloses a probiotic herbal beverage with intestine moistening and oil discharging effects and a preparation method thereof, and relates to the field of probiotic herbal beverages. Theherbal beverage comprises the following raw materials in parts by weight: 5-40% of a sugar alcohol solution, 1-10% of dietary fibers, 1-10% of a fungus extract, 1-10% of a white kidney bean extract, 1-10% of a Compton tea stock solution, 0.1-5% of apple original vinegar, 0.1-5% of noni juice, 0.1-3% of lactobacillus plantarum Lp90, and the balance water. The probiotic herbal beverage takes sugar alcohol, dietary fibers, fungus extract, white kidney bean extract, Compton tea stock solution and lactobacillus plantarum Lp90 as main functional components, and the main mechanism is that the functional components can effectively increase probiotics in the intestinal tract, and wrap the oil absorbed in the intestinal tract while promoting intestinal peristalsis so as to remarkably reduce the digestion and absorption of dietary fat in the body, and has a remarkable effect of moistening intestines and relaxing bowels.