Abstract：In a process of acquisition by vibroseis,because of different surface conditions,the non-linear nature of mechanic driven unit and the coupling issue between vibrator and ground resulted in signals of harmonic interference in different order that are multiple relation with the signal of basic wave in frequency,which are mixed in raw records.The common methods for suppression of harmonic interference is to carry out phase-changed sweeping,using the phases different to each sub-sweeping to suppress harmonic interference by correlation summation.The paper introduced a new method for suppression of harmonic interference,that is array sweeping method.The harmonic interference reduced with decrease of the width of sweeping frequency band,when the sweeping frequency band reached an octave,the harmonic interference disappeared.The basic idea using array sweeping to suppress harmonic interference is to reasonably design each sub-sweeping frequency band that can reach the goal of elimination of harmonic interference.
