The invention discloses a filling type cascade phase change heat storage solar hot air warmer. A solar hot air heat collector used as energy supply equipment collects solar energy, phase change material balls made from three phase change materials are encapsulated to spherical shells,a phase change box body is filled with the spherical shells in steps, natural layers are formed in an integrated structure, and the phase change material and air exchange heat more fully by means of gaps naturally accumulated among ball bodies in cooperation with a cascade structure, so that the energy utilizationratio is improved. An air heat collector is matched with a solar phase change warmer, so that humanized family heating is achieved. The filling type cascade phase change heat storage solar hot air warmer has the advantages of being simple to operate, rapid and light and convenient to move and the like.