Composite continuous pipe water sampling system

The utility model discloses a composite material coiled tubing water sampling system which comprises a composite material coiled tubing, one end of the composite material coiled tubing is buckled andconnected with an aboveground fitting, and the other end of the composite material coiled tubing is buckled and connected with an underground fitting; one end of the sand setting pipe assembly is connected with the underground hardware fitting, and the other end is connected with the submersible electric pump; the sand setting pipe assembly comprises an outer pipe and an inner pipe, wherein the outer pipe is formed by fixedly connecting a plurality of metal outer pipes through outer pipe couplings; the inner pipe is fixedly arranged in an inner cavity of the outer pipe; a sand setting annulusis formed between the outer pipe and the inner pipe; the sand setting cap is fixedly arranged at the top end of the inner pipe; and the connecting pup joint is fixedly connected with the lower end ofthe outer pipe and the lowe