The invention relates to a water spraying and shooting device for aerial live detection of hydrophobicity of an insulator of an electric transmission line. The device comprises an unmanned plane body,a hanger bracket, and a water spraying insulation rod, which is hung on the top of the inner side of the hanger bracket. A first end of the water spraying insulation rod is provided with a water spraying head. A support rod is arranged on the middle of the water spraying insulation rod. A high definition camera is arranged on the support rod. A second end of the water spraying insulation rod is provided with a bird repelling mechanism. The bird repelling mechanism comprises a horizontal cross bar arranged on the second end of the water spraying insulation rod and columns, which are verticallyarranged on end parts of the horizontal cross bar. The hanger bracket, the support rod, the horizontal cross bar, and the columns are all made of aluminum alloy. The aluminum alloy is prepared from the following components in percentage by weight: 2.0 to 3.2% of Mg, 3.5 to 4.5% of Si, 0.2 to 0.3% of Mn, 0.1 to 0.2% of Cr, 0.18 to 0.25% of Zr, 0.35 to 0.40% of Ti, 0.15 to 0.3% of Yb, and the balance being aluminum and impurities, and the impurity content is not more than 0.05%. The strength of provided device is high, the weight of the device is light, and the corrosion resistant performance is excellent. Moreover, the device can repel birds that try to come close to the device so as to avoid collision.