The invention discloses an oil transportation pipeline painting device convenient to use. A motor, a fan, a pump, a paint spraying structure, and a brush are fixed on a lower surface of a fixing plate. An upper end of a rotating shaft is connected with a rotating shaft of the motor, while a lower end of the rotating shaft is connected with an upper surface of a disc. Raw emery paper is fitted on a lower surface of the disc. A handle and a paint bucket are fixed on an upper surface of the fixing plate. The paint spraying structure comprises a first arc slab, and a second arc slab. M paint spraying holes are formed in an inner wall of each of the first arc slab and the second arc slab. The other ends of N branch pipes extend into the paint spraying holes. A grid is arranged in each paint spraying hole. Further, a storage battery is fixed on the upper surface of the fixing plate. The technical effects of raw emery paper, relatively high painting efficiency, and good painting effect are achieved.