The invention discloses fried broad beans and a preparation method thereof. The fried broad beans are characterized by comprising the following raw materials in parts by weight: 100-120 parts of broad beans and main frying materials, wherein the main frying materials comprise 2-4 parts of soybean oil, 2-3 parts of ginger oil, 2-3 parts of scallion oil, 2-3 parts of garlic oil, 2-3 parts of aginomoto, 2-3 parts of edible salt, 0.5-1.5 parts of white sugar and 4-6 parts of mature vinegar. The preparation method comprises the following steps: a) frying the broad beans, namely, airing the broad beans, washing, soaking for 42-60 hours, washing, mechanically opening the broad beans, washing, boiling in water, mechanically centrifuging to remove the water, frying the broad beans by using a frying machine for 18-25 minutes, and fishing out the fried broad beans; b) preparing the frying materials, namely, weighing the frying materials according to a weight ratio; c) frying the broad beans; d) weighing and packaging the fried broad beans. The preparation method of the fried broad beans is advanced and practical, and the fried board bean produced by using the preparation method is unique in fragrance, good in taste, rich in nutrition and beneficial for sale in market.