The utility model relates to an improved structure of a windmill, which comprises a support part and a plurality of blade parts. The support part comprises a shaft rod, a first support, a second support and a third support. The first support, the second support and the third support are all arranged on the shaft rod and each of them has a plurality of cross bars.The blade part is a quadrilateral structure with unequal side length and mirror effect. One end of one blade part of the complex blade part is connected with the first support, the other end is arc-shaped rotating along the first direction and connected with the second support, the other end is connected with the second support, and the other end is arc-shaped rotating along the first direction and connected with the third support.The improved structure of windmill provided by this creation can produce dazzling light by light reflection when the mirror blade with concave convex radian rotates, forming irregular and diamond like shining visual effect, which can be used to drive away birds or as installation art for people to watch.一種風車改良結構，包括一支撐部以及複數葉片部，該支撐部包括一軸桿、一第一支架、一第二支架以及一第三支架，該第一支架、該第二支架以及該第三支架皆設置於該軸桿上並分別具有複數橫桿。該葉片部為具鏡面效果之不等邊長的四邊形結構，複數葉片部其中之一葉片部一端與該第一支架相連接，其另端沿著一第一方向弧形旋轉並與該第二支架相連接，另一葉片部一端與該第二支架相連接，其另端沿著該第一方向弧形旋轉並與該第三支架相連接。本創作提供的風車改良結構，其具有凹凸弧度的鏡面葉片在旋轉時可藉由光線反射產生炫光，形成不規則有如鑽石般閃耀的視覺效果，可用以驅離鳥類或是做為裝置藝術供人觀賞之用。
