Water quality monitoring stratified sampling device

A stratified sampling device for water quality monitoring relates to the field of water quality sampling and comprises a sampling tank, the sampling tank comprises an annular side plate, a conical side plate is arranged at the bottom of the annular side plate, the bottom of the conical side plate is blocked by a bottom plate, the top of the annular side plate is blocked by a top plate, and a sampling water channel is arranged between the top plate and the bottom plate. A water inlet is formed in the bottom plate, a conical water outlet is formed in the top plate, a plurality of electric cylinders are arranged at the top of the bottom plate, telescopic rods of the electric cylinders are connected with a lifting disc, a center hole allowing a sampling water channel to penetrate through is formed in the middle of the lifting disc, a sampling assembly is arranged on the lifting disc, and the sampling assembly is matched with the sampling water channel. The device has the advantages of simple structure, convenienc