The invention relates to a method for purifying porcine circovirus type 2 virus-like particles and a use thereof. The method comprises clarifying the culture of porcine circovirus type 2 virus-like particles, collecting the supernatant, inactivating the viruses through pyrrole to obtain a semi-finished product, adjusting pH of the semi-finished product to less than 7, adding the semi-finished product into a strong cation exchange column balanced by a first buffer solution, eluting the strong cation exchange column through a second buffer solution, collecting components producing peaks and determining active protein components producing the peaks through polyacrylamide gel electrophoresis. The porcine circovirus type 2 virus-like particles purified by the method have purity of 87.40% and arecovery rate is 95%. The method is conducive to production and provides safe and reliable approaches for preparation of a porcine circovirus type 2 baculovirus vector inactivated vaccine.