The invention discloses a command cancel-based cache production line lock-step concurrent execution method, which is implemented through the following steps of: (1) performing lock-step concurrent execution by a consistency engine and a last-level cache according to a beat number appointed by a production line and receiving a message from a consistency cache respectively; (2) judging, by the consistency engine, whether the message hits the consistency cache, and judging, by the last-level cache, whether the message hits the last-level cache; and (3) judging, by the consistency engine, whether the last-level cache is required to be accessed, transmitting, by the consistency engine, a command confirmation signal to the last-level cache if the last-level cache is required to be accessed, allowing the last-level cache to access an off-chip memory, if the last-level cache is not required to be accessed, transmitting, by the consistency engine, a command cancel signal to the last-level cache to prevent the last-level cache from accessing the off-chip memory. The command cancel-based cache production line lock-step concurrent execution method has the advantages of low access and storage delay and high access and storage performance.