The invention discloses a segmented junk recovery method for a solid-state storage device. The method comprises the steps of adding a cache which difficultly loses data after power failure and is specially used for recovering service junk and migrating effective data, and temporarily storing the effective data needed to be migrated by utilizing the cache in effective data migration of junk recovery operation; when erasure operation is performed, in a way of setting a marker for marking a plane or a die in which a target block subjected to block erasure operation is located, feeding back junk recovery operation completion to an upper layer and continuing to make a response to a coming request, namely, not making a response to the request by the plane or the die, thereby avoiding a time delay of the response caused by the fact that a write request allocates idle pages of the plane or the die; and at gap time when read and write requests come, writing back the effective data migrated to the cache which difficultly loses the data after power failure to the solid-state storage device. According to the method, the time delays of read and write responses caused by junk recovery can be effectively shortened without influencing the junk recovery efficiency.