The present invention relates to the technical field of computers, and particularly to a method and device for addressing for solving the problem of low-efficiency addressing. The method of the present invention comprises: receiving an address translation request, wherein the address translation request contains a virtual address; determining a register to be accessed in a plurality of registers managed by an MMU according to the value of a first preset location in the virtual address, wherein the memory space comprises at least one of the following: a virtual address space of a kernel and a virtual address space of a process; looking up a base address of a page table to which the virtual address points in a page directory to which a base address of a page directory saved in the register to be accessed points according to the value of a second preset location in the virtual address; looking up a page entry corresponding to the virtual address in a page table to which a base address of the page table points according to the value of a third preset location in the virtual address; and translating the virtual address into a physical address according to the found page entry.