A multifunctional large-scale rainfall machine mainly includes: a lifting operation platform (1); a left lifting multistage hydraulic cylinder (2); a left injection pipe (3); a fan-shaped rotary box (4); a swinging hydraulic cylinder (5); a trunnion base (6) fixedly connecting a rotating support and the swinging hydraulic cylinder; a middle injection pipe (7); a rotary injection pipe fixing base frame (8); a right lifting multistage hydraulic cylinder (9); a fixed connecting shaft for the head of a piston rod of the swinging hydraulic cylinder (10); a right injection pipe (11) and etc. The growing environment of the crops in the farmland can be effectively improved, as well as the management and maintenance, such as timely irrigation, additional fertilizer, weeding, can be obtained.
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