The invention belongs to an experimental device and method for the reliability of a railway switch machine in a compound mechanical environment. The experimental device is characterized by at least comprising a controller (2), a horizontal vibration table (8) and a vertical vibration table (12), wherein the horizontal vibration table (8) and the vertical vibration table (12) are connected with thefoundation through an experiment table main body (7); the horizontal vibration table (8) is intersected with a static vibration axis of the vertical vibration table (12); at least two output channelsof a controller (2) are respectively connected with the horizontal vibration table (8) and the vertical vibration table (12). The experimental device and method for the reliability of the railway switch machine in the compound mechanical environment achieve a purpose of testing the safety and reliability of the switch machine through simulating the actual installation mode and the compound mechanical environment of the railway switch machine in the application environment.