The invention discloses a water-saving
irrigation device. The device comprises an extension connector, a combined
pipe, a first functional box, an auxiliary box, an oblique collecting plate, a collecting port, a closed rain box, a mixing box, a second functional box, supporting feet, a water outlet seat, a base, an
irrigation pipe, oblique pipes, installation support plates, four-way adapters, a first conversion sleeve head, a straight cylinder
pipe, a
tail pipe, a sealing cover, long
branch pipes, thin
branch pipes, a spraying pipe and
nozzle threaded seats. According to the water-saving
irrigation device, by arranging the oblique collecting plate and the auxiliary box at the inlet of the closed rain box, the advantages are achieved that the oblique collecting plate can be closed after rainwater is collected and a large
evaporation amount of the rainwater due to an open oblique collecting plate during
daytime is avoided. By arranging the water outlet seat in the bottom of the mixing box, the advantages are achieved that the rainwater is autonomously transferred and the storage capacity is increased. By arranging the mixing box, the second functional box and the first functional box on the left side of the closed rain box, the advantages are achieved that nutrients can be mixed and added for
irritation to save the time for subsequent manual operation of
nutrient replenishment and the functionality is high.