The invention discloses a phase noise suppression processing method and system. The method comprises the steps of: receiving an input signal, extracting a first phase angle value corresponding to the input signal, performing balance processing on the input signal, extracting a second phase angle value from the input signal after the balance processing, obtaining a phase noise estimation value according to the first phase angle value and the second phase angle value, determining a stepping weight value for performing convergence processing on the phase noise according to a phase noise sniper value, performing the convergence processing on the phase noise according to the stepping weight value, and suppressing the phase noise by the convergence processing. By using the method provided by the invention, pilot frequency data comparison is not needed, and the influenced data is directly influenced, so that the timeliness of phase noise processing is improved.