A method for sharing a file between multiple operating systems on a probable electronic device is provided. The method includes the following steps: in a first operating system, a central processing unit storing a modified file into a memory of a shared access area; the central processing unit establishing a link relationship between the first operating system and a second operating system, so that the second operating system learns an address of the modified file stored in the memory of the shared access area; switching from the first operating system to the second operating system; and in the second operating system, the central processing unit accessing the modified file in the memory of the shared access area according to the link relationship.