The disclosure is related to a method for removing crude oil sludge, which is convenient for removing sludge while the crude oil is transported. The method for removing crude oil sludge from crude oil includes the steps of: (a) classifying grains of sludge into coarse grains and small grains; (b) settling the sludge in the crude oil discharged from the classification step to separate the coarse grains from the crude oil; (c) sending the crude oil which is the supernatant constituent in the settling step to a filter in order to separate the remaining sludge in the crude oil; and (d) introducing a part of the above crude oil to a reverse washing liquid inlet of the filter, in order to wash reversely the filter medium of the above filter.
