Abstract- This paper provides a high-step-up non-isolated interleaved DC-DC converter with a common buck-boost clamp. In the presented converter, the coupled-inductor boost converters are interleaved to achieve high step up power conversion with reduced duty ratio. A bidirectional buck boost converter is used to clamp the voltage stresses of all the switches in the interleaved converters, caused by the leakage inductances present in the practical coupled inductors, to a low voltage level. PID controller is used to provide gate pulses to the buck-boost converter. Thus, efficiency can be improved. The simulation results declare that the converter has high efficiency and high-step-up ratio.