The invention discloses a storage memory distribution access method and device. The method comprises the following steps of: linearly distributing different access addresses to various storages in a processor, wherein the access addresses include a direct addressing address field; according to the direct addressing address field, setting a direct addressing instruction for the processor, wherein the direct addressing instruction represents that a low 11-bit data address is used as the direct addressing address field; if the processor receives the direct addressing instruction, analyzing the direct addressing instruction to obtain a direct addressing address; and accessing the direct addressing address, and executing data operation according to the direct addressing instruction. By means of the storage memory distribution access method and device disclosed by the invention, the direct addressing instruction is set for the processor; the low 11-bit data address represents the direct addressing address field in the direct addressing instruction; therefore, the direct addressing address field is enlarged; and thus, the access speed is increased.