Along with the popularization of the embedded equipments and the hand-hold equipments, the power consumption already became the first essential factor. In this paper, we will design a low power cell library which is suitable for the public key algorithm by changing the circuit structure, reducing the number of transistors and clock gating. We will design the low power consumption standard cells, and draw the layouts, and gain the standard cell library, which can be provided to the public key algorithm chip designer.