The invention discloses a method, device and system for eliminating a processing trace of parallel imaging. The method comprises that a seismic pre-stack data body is decomposed to obtain sub data bodies; Kirchhoff pre-stack depth offset parallel calculation is carried out on the sub data bodies to obtain sub imaging bodies; each sub imaging body is processed by a corresponding attenuation filter;the sub imaging bodies processed by the attenuation filters are stacked to obtain a final imaging body. One attenuation filter is applied to each sub imaging body, the problem of parallel trace caused by regularization of the online illumination frequency of Kirchhoff depth offset parallel imaging is solved, parallel traces including segmented arching and vertical intensity values are eliminatedthoroughly, the continuity of an in-phase axis is enhanced, the signal to noise ratio of an imaging profile is improved, and tomography of imaging is clearer. The advantage of high efficiency of parallel processing is given to full play, and the effect of parallel imaging is ensured.