The invention discloses a canal-irrigation-area pipe water delivery irrigation system, relates to irrigation of hydraulic engineering and particularly relates to irrigation for canal irrigation areas. The irrigation system comprises a water source (11), a first pipe (12), a water inlet gate (13), a ventilation hole (14), a ventilation pipe inlet port (121), a ventilation pipe (15), a water distribution pressure reduction pool (21), a water inlet pipe (22), a water outlet pipe (23), a first flexible joint (221), a beam (24), a shaft sleeve (25), a rocker arm (26), a first hinge pin (261), a valve rod (27), a circular plate (271), a sealing ring, a second hinge pin (262), a floating ball rod (28), a floating ball (281), a limit rod (29), a rod base (291), a second pipe (31), a second flexible joint (231) and a hydrant (32). The irrigation system can be applied to canal irrigation areas and is capable of performing irrigation according to irrigation requirements and water saving.