A method for processing data, a memory management unit and a memory control device are disclosed. In an embodiment, the method includes receiving, by a memory control device, a first data packet carrying a virtual address and a page table base address that are sent by a memory management unit, executing, by the memory control device, a page table walk operation according to the virtual address and the page table base address, to obtain a physical address corresponding to the virtual address and sending, by the memory control device, the physical address corresponding to the virtual address to the memory management unit.