The invention discloses a method for controlling humidity and improving light environment of greenhouse cherries in north. The method comprises the following steps that 1, tree bodies are unfastened; 2, ridges are formed, and cultivation is conducted; 3, soil humidity drip irrigation zones are laid and controlled; 4, a PE film is laid, wherein the PE film is laid between two adjacent ridge surfaces and used for storing water and improving a light condition of a greenhouse, the periphery of the film is arranged to be beyond the upper ridge surface and the lower ridge surface, the water is prevented from leaking into the soil, and the PE film partly covers a first drip irrigation zone and a third drip irrigation zone; 5, a second drip irrigation zone is laid and controlled, wherein the second drip irrigation zone is laid on the portion, between two adjacent ridge surfaces, above the PE film and used for improving the humidity of the greenhouse; 6, from first to fifth in June, a large amount of fruits ripen, and the PE film and the first drip irrigation zone, the second drip irrigation zone and the third drip irrigation zone on the film are removed and placed and stored in the shade plate, and used continuously after being cleaned in the next year.