The invention relates to a blueberry cake and a preparation method of the blueberry cake, and belongs to the technical field of food and preparation methods of the food. The blueberry cake comprises the following raw materials in parts by weight: 200-400 parts of cake flour, 50-80 parts of almond powder, 60-90 parts of corn flour, 20-50 parts of tartar powder, 15-30 parts of baking powder, 100-200 parts of powdered sugar, 2-5 parts of salt, 100-200 parts of unsalted butter, 50-80 parts of milk, 30-50 parts of orange juice, 80-200 parts of water, 3-5 eggs, 50-80 parts of dried blueberries, 3-5 cherries, 2-4 bananas, 30-50 parts of carrot, and 20-30 parts of medlar. According to the blueberry cake, the blueberries, the cherries, the bananas, the carrot, the medlar and the like are also added, so that the perfect combination of vegetables and fruits is achieved, and the prepared cake is more fragrant and sweet, diversified in taste, and balanced in nutrition.