The invention relates to an externally-embedded gap annular plastic turbulence douche for drop irrigation. Because the douche is embedded in the lower layer of earth surface, the douche can automatically control to evenly drop, the water dropper has small possibility of clogging and aging, the service life of the douche can be 25 years, and the douche can be continuously and reliably operated under the extremely severe conditions. The douche is suitable for various perennial deep-root crops, such as fruit-bearing forests, ecological forests, traffic protection forests, fixing forests, farmland breakwind, desert economic vegetations and the like. The appearance of the douche is characterized in that a black plastic douche water jacket formed by one-time injection and a water cover are sheathed into a totally-closed douche; then the totally-closed douche is spliced with PE seam capillaries of phi 4, 6 and 8 to form a whole turbulence douche having no possibility of clogging; the turbulence douche is externally embedded on a PE (poly ethylene) hose of phi16 according to the space between planted crops; the turbulence douche and the PE hose are embedded on the root positions of plants on the lower layer of the earth surface; and thus, the whole installing project of the whole drop irrigation system can be finished.