Different-depth water quality sampling device for environmental monitoring

The invention provides a different-depth water quality sampling device for environmental monitoring. The different-depth water quality sampling device comprises a box body, a PLC, a storage battery, an electric pipe winder, an electromagnetic multi-way valve, a submersible pump and an air bag, a water sampling pipeline is wound on the electric pipe winder, one end of the water sampling pipeline isconnected with a water inlet of the electromagnetic multi-way valve, and the other end of the water sampling pipeline is connected with a water outlet of the submersible pump; a plurality of bottle caps are mounted in the box body, and each bottle cap is connected with a sampling bottle; each bottle cap is provided with a water inlet pipe, an exhaust pipe and a liquid level sensor; the water inlet pipes on the plurality of bottle caps are correspondingly connected with the plurality of water outlets of the electromagnetic multi-way valve respectively; an exhaust port is formed in the side wall of the box body and is