The utility model provides a prevent blockking up automatic irrigation system, including driping irrigation the pipeline, still include the spiral ring, drip irrigation the pipeline and set up the multirow apopore, the spiral ring is located the inside of driping irrigation the pipeline, just the outer wall of spiral ring with the inner wall of driping irrigation the pipeline meets, pneumatic means is connected at the both ends of spiral ring, promotes the spiral ring through pneumatic means and slides in the inside of driping irrigation the pipeline. The utility model discloses in, the inside of driping irrigation the pipeline sets up the spiral and encircles, and outer wall that the spiral encircled and the inner wall of driping irrigation the pipeline meet, and when the spiral ring moved along the axis direction of driping irrigation pipeline inside, the spiral encircled and drips irrigation and produces the friction between the pipeline, and the messenger is stained with the impurity that glues on driping irrigation inner wall of the duct and apopore and drops to prevent that its jam from driping irrigation the pipeline.