The invention discloses a pipeline for fish culturing. The pipeline comprises a pipeline body, one end of the pipeline body is in threaded connection with a second filtering net, the other end of thepipeline body is in threaded connection with a first filtering net, and ventilation holes are uniformly formed in the surface of the pipeline body. The pipeline is reasonable in design and convenientto use, by arranging a lifting hydraulic rod and a rotary bearing, the pipeline body is conveniently arranged obliquely so that fish feed and fish manures in the pipeline can settle naturally under the action of gravitational force, by arranging a salvaging ring, the placing and salvaging of the pipeline are convenient, by arranging a driving motor and controlling the rotation rate of the drivingmotor through a controller, the control of flowing rate in the pipeline body can be achieved, by arranging a gauze net, the possibility that a turbine is twisted by debris of algae and the like is reduced, by arranging the ventilation holes, oxygen exchanging rate is provided, and the escaping of cultured fish in the pipeline body can be prevented. The pipeline has the advantages of being compactin structure, simple to operate and suitable for widely popularization.