The present invention provides a self-driven synchronous rectification boost converter. The self-driven synchronous rectification boost converter has a first switch receiving a pulse driving signal, a first winding and a synchronous rectification circuit constructed by an auxiliary winding and a second switch. The first winding stores energy when the first switch is switched on and releases energy when the first switch is switched off to achieve boosting. In the meantime, the auxiliary winding cooperates with a switch circuit to switch on/off the second switch according to a voltage inducted from the first winding, so as to achieve an object of synchronous rectification. Under a condition of outputting high current, the present invention can greatly reduce power-consumption of rectifying and enhance efficiency.
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