The utility model relates to a multifunctional extensible imitative ecological space occupying type bird repelling device. The wind driven generator comprises a base, a cross-shaped vertical piece, abionic device and a wind wheel shaft, an inserting groove is formed in the lower part of the base; a cam lock catch device is mounted at the lower part of the base; a cross-shaped vertical piece is installed on the upper surface of the base and formed by connecting a vertical rod and a middle shaft, the bottom of the vertical rod is installed on the base, a bionic device is installed at the upperend of the vertical rod, the middle shaft is installed on the upper middle portion of the vertical rod, the middle shaft is perpendicular to the vertical rod, and the left side and the right side of the middle shaft are each provided with a wind wheel shaft provided with multiple wind wheels. The bird dispeller is low in manufacturing cost, convenient to disassemble and assemble, good in insulating property, not prone to damage, and capable of reducing power failure and electrification times after being used, relieving labor intensity, effectively improving bird dispelling efficiency and improving operation reliability of a power distribution line.