The invention aims at providing a method for realizing a high-security redundant buffer queue. The method comprises a data reporting process and a data issuing process, wherein, the data reporting process is realized by the following steps: an inner comparison domain setting step, a pre-treatment step, a step of calculating the outer comparison domain boundary, a data comparison step and a data reporting step; and the data issuing process is realized by the following steps: a data comparison step, a reporting mistake step and an issuing data step. The method increases the two-stage comparisondomains by software, improves and adopts the centralized comparison way due to the system reporting interruption, can provide efficient and safe buffer comparison function, and meanwhile can effectively reduce data loss probability due to delayed arrival.