The invention provides a hydrogenation method for silicon tetrachloride, and belongs to the technical field of polycrystalline silicon production. The hydrogenation method for silicon tetrachloride ischaracterized in that silicon tetrachloride and hydrogen are introduced into a gas discharge reactor filled with an electromagnetic field adjusting material and a supported metal catalyst, and a reaction is performed under the action of the electromagnetic field. The method can improve the low-temperature hydrogenation efficiency of the silicon tetrachloride and reduce the temperature of a reaction system.