The invention discloses an aluminosilicophosphate molecular sieve in a multistage hole structure, and a preparation method and application thereof. Crystal grains of the molecular sieve are cubic, the surface of the molecular sieve is provided with obvious multistage pore passages, and the pore diameters of the pore passages are distributed between 0.3nm-600nm. The molecular sieve is made into a catalyst and can be applied to methanol or dimethyl ether in a reaction for preparing low-carbon olefin, namely methanol and dimethyl ether or a mixture of the methanol and the dimethyl ether serve as raw materials and react in a fixed bed or a fluidized bed reactor to produce the low-carbon olefin, and the molecular sieve has good catalytic activity and low-carbon olefin selectivity. The aluminosilicophosphate molecular sieve has the advantages of being simple in process, low in cost, little in pollution and suitable for industrial production.