The present invention relates to a sludge suction washing car that cleans sludge generated from water and sewage or a river, and vacuums the cleaned sludge, and is divided into a washing tank, a water tank, and a sludge tank, and is a storage tank for separating and storing the washing water and sludge. And a vacuum pump for forming a suction force in the storage tank to form a vacuum pressure for sucking the cleaned sludge, and a washing pump installed in the cleaning line piped to the storage tank to pump the washing water at high pressure. By washing and suctioning with a large number of vehicles at the same time, it is possible to reduce the required vehicle and to simply work even when the work site is narrow.
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