Blueberry plant safe overwintering device

The invention discloses a blueberry plant safe overwintering device, which is characterized by consisting of an upright rod, upright rod pull wires, an upper pull wire, plastic cloth and a shielding cover, wherein upright rod pull wires are arranged on the two sides of the upright rod; the top parts of the upright rod pull wires are connected with the top part of the upright rod; the upper pull wire is arranged on the top of the vertical rod; plastic cloth is covered on the upright rod pull wires and the upper pull wire; and the shielding cover is covered on the plastic cloth. The cost of the device is low, the material and labor cost per mu (=0.0667 hectare) is 60 percent lower than cold greenhouse and 240 percent lower than sunlight greenhouse; the effect of the device is desirable, and by operating according to technical regulations, the sprouting of the blueberry plants can be prevented completely; the organic covering layer is not damaged; the operation is simple, the device is easy to master, and the pl