The invention provides an aluminum silicophosphate molecular sieve particle. The particle simultaneously has a small-porous molecular sieve crystal structure and a straight-through type macro-porous double-channel structure; and the volume of a macro-porous pore is 5-60% of the volume of a cubic particle. The invention further provides a method for preparing the molecular sieve particle. According to the invention, an SAPO (Silicoaluminophosphate) molecular sieve particle which is provided with abundant straight-through type macro-pores is successfully synthesized, and crystal characteristics and pore structure characteristics are clear. The macro-porous structure of the molecular sieve particle can effectively weaken inner dispersion and is suitable for limiting a serious reaction process by the inner dispersion, such as a process for preparing olefin by alcohol ether.