Vegetable planting greenhouse capable of recycling rainwater

The vegetable planting greenhouse capable of recycling rainwater comprises a greenhouse body, rainwater collecting grooves are fixedly formed in the surfaces of the upper ends of the two sides of the greenhouse body, a first water tank and a second water tank are arranged on the two sides of the greenhouse body respectively, outlets of the rainwater collecting grooves are connected with a main pipeline, a three-way electromagnetic valve is arranged on the main pipeline, and the three-way electromagnetic valve is connected with the main pipeline. Two outlets of the three-way electromagnetic valve are respectively connected with the first water tank and the second water tank through branch pipelines, an electromagnetic flowmeter is arranged on the branch pipeline connected with the second water tank, the first water tank is connected with an irrigation spray head arranged in the greenhouse body through an irrigation pipeline, an irrigation water pump is arranged on the irrigation pipeline, and the irrigation wa