Novel water quality sampler

The utility model relates to the field of water quality detection, and discloses a novel water quality sampler which comprises a sampling barrel, two ends of the sampling barrel are opened, and sealing structures for sealing the openings are fixed at the openings at the two ends of the sampling barrel; the sealing structure comprises a first sealing plate and a second sealing plate which are hinged to the sampling barrel, a bolt mechanism is arranged on the first sealing plate, and a jack seat is arranged on the second sealing plate; when the first sealing plate and the second sealing plate are in the opening state, the bolt mechanism is inserted into the jack seat to keep the first sealing plate and the second sealing plate in the opening state, and the bolt mechanism can be separated from the jack seat at a set water depth to seal the opening of the sampling barrel by the first sealing plate and the second sealing plate; and the first sealing plates and the second sealing plates corresponding to the two end