Pole connection was the key component of the rotor of generatormotor synchronous machines. Reasonable connection structure could effectively avoid the pole connection fusing fault caused by the frequent switch of operation conditions of generatormotor synchronous machines. For this purpose, three typical pole connection structures were analyzed by finite element method. And the stress and fatigue data of the three structures under the conditions of rated speed 300 r/min and 500 r/min were also calculated precisely. Combined with fatigue analysis result, the typical structure of pole connection of highspeed generatormotor synchronous machines was proposed, and the suggestion of design scheme was also presented. The research results could provide an important technique support for the selection of pole connection and operation maintenance of pumpedstorage power stations.