Proton beam energy selection control system

A proton beam energy selection control system comprises a system board card, a motion board card, an energy reducer, a plurality of four-fan collimators and a plurality of magnets, and the magnets comprise four-stage magnets, guide magnets and deflection magnets. The system board card comprises a multi-task scheduling unit which is provided with a synchronous motion instruction transmission module, and when initialization processes of a plurality of tasks are started in an asynchronous mode in an end-to-end connection mode, the module enables a multi-task module started in the asynchronous mode to receive a scheduling instruction at the same moment in an instruction transmission mode; the energy selection control system controls the energy reduction response time of each gear of the energy reduction device to be faster than the response time of the multi-wedge-shaped energy reduction device, and energy switching can be completed within 50 milliseconds. According to the method and the device, the problem that