The invention discloses a tellurium nanorod, energy storage devices and a preparation method thereof, and a method for preparing tellurium nanomaterials, and relates to the field of preparation of thetellurium nanomaterials. According to the method for preparing the tellurium nano materials, the preparation of the tellurium nano materials can be realized through a simple electrochemical strippingmethod only under normal temperature and normal pressure conditions, the preparation method is simple to operate, and the electrolysis equipment used is simple. The tellurium nanorods prepared by thepreparation method are one-dimensional tellurium nanorods, can be widely applied to various energy storage devices, and have the advantage of high capacitance.