The invention relates to a method for avoiding data migration in a hardware affair memory system. The method comprises the following steps: redirecting the write operation in the affair, which operates in the affair memory system, into a free address space by using the address redirection form; in the redirection form, recording the original address and the redirected address in a forecast addition mode, wherein the original address is used for storing data values before the affair operation, and the redirected address is used for storing data values after the affair operation is modified; when the affair is submitted normally, redirecting the visit to the original address to the redirected address; and if the affair comes into collision and needs to be cancelled, clearing the related items which are added into the redirection form, and directly visiting the original address in the subsequent operations. The invention is applicable to any hardware affair memory system, and can greatlyenhance the system performance.