River channel water quality detection sampling device

The invention belongs to the field of detection sampling devices, and particularly relates to a riverway water quality detection sampling device. The device comprises a floating cabin, a driving assembly, a guide assembly, a sampling box, a sampling assembly, a sealing assembly and a pay-off assembly; the floating cabin comprises a group of main cabins and two groups of wing cabins; the two sets of wing cabins are symmetrically arranged on the two sides of the main cabin, a top cover is hinged to the upper end of the main cabin, a clamping cylinder is arranged in the main cabin, and the lower end of the clamping cylinder penetrates to the bottom of the main cabin; and a clamping groove is formed in the inner wall of the clamping cylinder. Through cooperative use of the floating cabin, the driving assembly, the guiding assembly, the sampling box, the sampling assembly, the sealing assembly and the pay-off assembly, the sampling device can freely select the sampling position and the sampling depth of river wate