The invention discloses extraction equipment of a synchronous clock and a method thereof. The invention obtains a horizontal synchronization separation threshold defined by the standard format of a signal and a sampling clock frequency through a vertical synchronization separator; compares the horizontal synchronization separation threshold with a sampling counting value of an interference complex signal to obtain a delay complex synchronization signal after eliminating the interference according to the compared result. Therefore, the invention is capable of eliminating a pulse interference existing possibly in the signal. The invention phase demodulates a first signal and the delay complex synchronization signal to generate a control voltage according to the phase demodulation result, a control oscillator to generate a pixel clock signal and the pixel clock signal undergoes frequency division according to a frequency division ratio defined by the standard format of the signal to obtain the horizontal synchronization signal through a phase-locked loop, wherein the first signal is obtained by delay handling the horizontal synchronization according to the horizontal synchronization separation threshold and is capable of offsetting the delayed time caused by eliminating the pulse interference in the synchronization signal.