The invention discloses a preparation method of a can of a steamed fish head with diced hot red peppers. The method comprises the steps of (1) chopping a spotted silver carp head in the middle part, removing the gill, and cleaning for later use; (2) putting cooking wine and salt into the spotted silver carp head, evenly mixing and pickling for 15-20 minutes; (3) dicing chive and garlic, removing the peel of ginger and cutting into shreds for later use; (4) spreading the shredded ginger onto the pickled carp head, then spreading the diced hot red peppers onto the shredded ginger to cover the whole carp head, putting the carp head into a steamer with boiling water, and steaming for 12-20 minutes; (5) canning the carp head steamed in the step (4), spreading the diced garlic and chive obtained in the step (3) onto the carp head, pouring the heated oil onto the carp head, cooking for 20-30 minutes, and sterilizing to obtain the can of the steamed fish head with the diced hot red peppers. The steamed fish head with the diced hot red peppers, prepared by the method, is glutinous and soft, tender in meat quality, salty and delicious, and slightly spicy. The can of the steamed fish head with the diced hot red peppers can be stored at room temperature, can be eaten after being heated, and is suitable for general public consumption; the can of the steamed fish head with the diced hot red peppers is unique in flavor, delicious and rich in nutrition.