The invention discloses convenient instant frog oil and a preparation method thereof, which is made from yam, medlar, rehmannia root, antler, ginseng, angelica and hawthorn which are decocted, soaked and decocted again. During the soaking process, the frog oil absorbs effective components in multiple kinds of traditional Chinese herbal medicines, and the effective components are combined with the own nutrient substance of the frog oil to produce synergic action, thereby strengthening the stomach and the spleen, nourishing Yin, reinforcing yang, improving human body immunity, relieving neurasthenia and delaying senility. After the frog oil is soaked in multiple kinds of traditional Chinese herbal medicines, the effective components of the frog oil is lixiviated completely, the components are matched mutually, and the efficacy is more obvious. The effective components of the frog oil are confected with yam, the medlar, the rehmannia root, the antler, the ginseng, the angelica, the hawthorn and honey scientifically, which can improve human body immunity, delay senility, nourish kidney, benefit essence and enhance brain function and intelligence. Compared with the prior art, the instant frog oil has the advantages that the instant frog oil is more convenient for eating, can be eat at any moment and does not need being soaked as required; the nutrient components are absorbed more completely.