Online sampling detection mechanism for culture waterline

The invention relates to the technical field of water sampling, and discloses an online sampling detection mechanism for a culture waterline, the online sampling detection mechanism comprises the culture waterline and a plurality of water receiving trays arranged below the culture waterline, a sampling box is arranged below the culture waterline, and a driving cavity and a plurality of sample receiving cavities are formed in the sampling box; sliding holes communicated with the adjacent sample collecting cavities are formed in the outer sides of the sampling boxes, sampling pipes are arranged in the sliding holes in a sliding and penetrating mode, driving assemblies used for driving the sampling pipes to move are arranged in the sampling boxes, sliding holes are formed in the inner walls among the multiple sample collecting cavities, and the sampling pipes are in sliding fit with the sliding holes; a plurality of water inlet holes are formed in the end part of the sampling pipe in the sampling box. Water liqu