The invention discloses a preparation method of green tea and mint-flavored peanuts. The preparation method comprises the following steps: heating and boiling peanuts in a jacketed pan; heating and boiling green tea to obtain filter liquor A; soaking the peanuts with the filter liquor A, and stir-frying until the peanuts are cooked by 30%-45%; heating and boiling mint to obtain filter liquor B, soaking the peanuts with the filter liquor B, and stir-frying until the peanuts are cooked by 50%-60%; heating and boiling bitter tea, peppers, medlar, ligusticum wallichii, lysimachia sikokiana, lysimachia foenum-graecum, zanthoxylum bungeanum, cloves, allspice, thyme, dried orange peels, fennel, cassia twigs and bay leaves, adding the peanuts, soaking, and stir-frying until the peanuts are cooked by 70%-80%; adding salt, cooking wine, taumatin, trehalose, stevioside and monosodium glutamate into water, stirring for heating, adding the peanuts, soaking and drying. The peanuts prepared according to the method are unique in flavor, fresh and cool in mouth feel, fragrant, crisp and delicious; decayed tooth and glucose fluctuation are hardly caused after the peanuts are eaten.