The invention discloses a sweet potato cake and a production method thereof, and belongs to the field of food processing. Raw materials comprise, by weight, 30%-32% of superior ground-growing sweet potato, 42%-44% of flour, 4% of lotus root starch, 4% of pine nut powder, 3% of lotus seed powder, 3% of buckwheat, 1% of plant oil, 2% of sugar and 9% of water. The method comprises the steps that theflour, the lotus root starch, the pine nut powder, the lotus seed powder and the buckwheat with the formula amounts are put into a mixing machine to be uniformly mixed to obtain mixed powder; fresh sweet potatoes with the formula amount are selected, peeled and put into a steaming boiler to be boiler for about 10-12 minutes, and the boiled sweet potatoes are put into a stirring device to be stirred into mashed sweet potato; the mixed powder and the mashed sweet potato are put into the stirring device, the plant oil, sugar and water with the formula amounts are added, uniformly stirred, kneadedinto sweet potato paste and pressed into cakes by hands, the cakes are put into a pot to be fried with oil by small fire until the two sides of the cakes are golden, and finished products are obtained.