Device preventing bird nesting

The utility model discloses a device preventing bird nesting and belongs to the power transmission and transformation device technology field. The device comprises an electric pole and a left side angle iron cross arm. The left side angle iron cross arm is fastened at the left side of the electric pole through a hooping bolt. The device also comprises a left side flat plate. The left flat plate and the angle iron cross arm are fixedly connected and cover the gap between the left side angle iron cross arm and the electric pole horizontally. By utilization of the flat plate covering the gap between the left side angle iron cross arm and the electric pole, plant straws and firewood carried by birds cannot be inserted, there are no support points for building a bird nest, and the plant straws and the firewood are blown away once wind blowing. The device is easy to manufacture and install and obtains good bird driving effects after practical popularization application. The device purchase cost can be lowered and power supply safety is ensured.