The present application provides a method and device for a first operating system to access resources of a second operating system. The method for a first operating system to access resources of a second operating system comprises: when initializing the first operating system, allocating an internal storage storing a kernel page table and a user page table to a low address space and reserving a high address space; acquiring from the second operating system register configuration information of a kernel page table of the second operating system; and on the basis of the register configuration information of the kernel page table of the second operating system, configuring a register of the high address space of the first operating system, thereby enabling the high address space to directly access kernel resources of the second operating system. The technical solution provided in the present application can improve the performance of the first operating system in directly accessing the resources of the second operating system.
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