Abstract: A sliding self-locking mechanism is located between a first linking element and a second linking element. The first linking element is movably assembled with the second linking element. The second linking element forms a receiving space and the sliding self-locking mechanism is located in the receiving space of the second linking element. When the first linking element is slidingly being installed with the second linking element at a predetermined location, the sliding self-locking mechanism movably locks the first linking element. The sliding self-locking mechanism can be implemented in large-scaled electronic devices having two modules. The first and second linking elements are individually assembled with a module for automatically locking two modules of an electronic device by a sliding method. It is convenient for the user to disassemble and assemble the modules, and maintain and package the modules. Its structure is simple and it only needs a small receiving space.