The invention discloses a seat rotating stand of a high-speed train, comprising a basic frame, a center revolving plate, a center support and a middle handrail, wherein the center revolving plate is fixedly connected in the basic frame, and the center revolving plate is provided with a rotation hole; and the lower end of the center support is fixedly connected on the basic frame, the upper end ofthe center support is connected with the middle handrail, the basic frame is a rectangular frame surrounded by a left side frame, a right side frame, a front sleeve pipe and a back sleeve pipe, and the basic frame and the middle handrail are both made from magnesium alloy materials. The invention reduces the weight by adopting light materials and ensures the mechanical strength of a product by adopting reasonable structural design and using steel materials at key load-bearing parts and abrasion parts. The running requirement of the high-speed train with the speed per hour of more than 300km/hcan be met, the weight reduction effect is obvious, and the riding comfort is improved.