The invention discloses an energy-saving petroleum pipeline cleaning device. The device comprises a petroleum pipeline buried underground, multiple ultrasonic sensors installed on the ground and a control center connected with the ultrasonic sensors, wherein a pipeline cleaning device is arranged in the petroleum pipeline, and the pipeline cleaning device comprises a rubber plug, an oil pipeline with one end connected in the rubber plug in an inserted mode, a power generation device fixedly installed in the oil pipeline and a first cleaning device and a second cleaning device which are fixedlyinstalled on the outer wall of the oil pipeline. The energy-saving petroleum pipeline cleaning device has the advantages that the pipeline inner wall can be cleaned without consuming commercial power, moreover, various stubborn stains can all be cleaned away thoroughly at once, and there is no need to add various chemical auxiliaries to clean repeatedly, so that the time and energy are saved, andthus the practicability is high.