The invention discloses a preparation method of a perovskite micron-ring array which is a whole-inorganic CsPbX3 perovskite micron-ring array or a whole-inorganic CsPb(BrnAl-n)3 perovskite micron-ringarray, wherein X is one of chlorine ion, bromine ion or iodine ion, A is one of chlorine ion or iodine ion, 0 < n < 3. The preparation method includes the steps of: 1) production of a colloid single-layer template: spin-coating a substrate with a polystyrene microsphere suspension liquid to prepare the colloid single-layer template when water is evaporated out completely; 2) preparation of the perovskite micron-ring array: spin-coating the colloid single-layer template with a perovskite precursor solution, and when the coating is dried, soaking the template in methylbenzene to remove the polystyrene microspheres, and heating the template to form the perovskite micron-ring array. The method has simple operations and is low in operation difficulty. The size of the perovskite micron-rings and the emission wavelength of the perovskite micron-ring array are both adjustable.