The invention provides a control circuit for a dimming light emitting diode (LED) lighting circuit. The control circuit comprises a voltage divider used for receiving an input voltage from an input end for generating dimming signals, a controller used for generating switching signals according to the dimming signals and generating control signals according to the input voltage, and an adaptive leakage flow device used for receiving the control signals and extracting leakage current from the input end according to the control signals.