The invention belongs to the technical field of waste gas purification, and particularly relates to a water-spray-type tubular dust collector. According to the water-spray-type tubular dust collector provided by the invention, the technical principles of an impingement dust collector and a water-film-type dust collector are combined together, the dust of the saturated wet flue gas can be removed, and the problems of dedusting and demisting the flue gas treated by a wet desulfurization device can be solved. The water-spray-type tubular dust collector is generally applied to the electric power environmental protection industry, and has the working position at the downstream part of the flue gas wet desulfurization device (FGD) of a thermal power plant; a water film is formed on the surface of a dust collection tube bundle in a water pouring way or a water spray way, so that impurities such as fine particle dust, gypsum, liquid water and the like in the flue gas can be caught; therefore, the clean emission of the flue gas of the thermal power plant can be realized, and the dust removing efficiency and the long-term work stability of equipment are guaranteed.