Obsessive-compulsive disorder (OCD) showed the functional connectivity alterations in default mode network (DMN), central executive network (CEN) and salience network (SN) 1. We investigated the difference of intrinsic networks between OCD and healthy controls (HC) from thought-action fusion (TAF) task and resting state by using fMRI. During TAF task, Power spectral density (PSD) of SN in OCD showed lower than PSD in HC in low-frequency bins. PSD of SN showed a significant correlation with TAF score and OBQ scale in OCD. Therefore when doing TAF task, OCD symptoms might have relations with alterations of PSD of SN.