<p>A comprehensive high-speed train control system is essential for reliable and efficient train operation. A global switching control strategy is introduced to address cooperative control challenges under high speeds and complex communication conditions. To enhance speed tracking stability and convergence under normal communication, a super-twisting sliding mode controller and a fast terminal sliding mode controller are combined. An improved distributed cooperative fault-tolerant control method based on the TACS communication system is introduced to maintain safe distances and speeds between trains when train-ground communication is disrupted. Accurate control of train spacing is achieved by adjusting the potential energy coefficient and coefficient of information. To prevent swaying and coupler wear caused by carriage coupling, a coupler safety constraint controller is proposed. This controller applies segmented constraints on speed and position errors between car bodies to ensure safe coupler operation. The coordinated switching control scheme integrates single-point and multi-particle control methods, refined for varying train dynamics and communication states. The effectiveness of the control scheme is validated through simulations with actual high-speed train operational data.</p>