Common crane (Grus grus), also known as the Eurasian crane, is widely distributed in China. From 2019 to 2021, some cranes were in trouble when they stopped in the suburbs of Urumqi and were running into 220 kV transmission lines. Probably because there was a blind area in the front of crane, about 49 cranes fell after hitting the high-voltage line. And more injuries and deaths were reported by the local media previously, with a casualty rate of 5.4% per 1000 cranes. Cornfields and wetlands near the power line are the places where the cranes like to go, but the death toll in previous years was not so much. We examined the cranes in the field, all of which were sub-adults (more than 94% is 2-4 years old; such as their body feathers were lighter and the top of the head without red spot). According to observations, thousands of adult Common cranes have passed through this area in mid-March and late, with no casualties. Why we didn"t find the dead bodies of the one-year-old cranes then? Maybe they were led by experienced parents at that time. Examination of the injured body parts showed that the Common crane had the highest rate of broken wings, reaching 53%; the rate of leg fracture was also high, up to 51%; abdominal or back abrasions accounted for 24%; head or neck bruises were about 14%; about 41% of the injured cranes were with multiple injuries. Finally, we analyze the blind area of vision, and try to discuss, introduce and recommend several effective solutions. 修改：Common cranes (Grus grus), are widely distributed in China. Some of the population pass through the area around Urumqi (Western China) during their annual migrations. A number of these birds collide with power lines (220 kV transmission). Between 2019 and 2021 systematic surveys were conducted and at least 49 cranes were recorded killed because of hitting power lines. Injuries and deaths more than this number have been casually reported and we estimate the casualty rate to be about 5.4 % of all cranes visiting the area (Table 1). This death toll may be increasing. Cornfields and wetlands near power lines are the habitats frequented by the cranes. We examined cranes which had apparently collided with power lines, all were sub-adults (more than 94 % were 2-4 years old birds; body feathers were lighter than in fully mature adults and the top of the head was without the red marking). According to observations, thousands of adult Common cranes pass through this area in mid-March and later, but apparently there are no casualties. Why did we not find the dead bodies of one-year-old cranes? We suggest that they were led by experienced parents at that time. Examination of the injured body parts showed a high rate of broken wings, (53 %) and broken legs (51 %); abdominal or back abrasions were found on 24 % of birds, and head or neck bruises on about 14 %. About 41 % of the injured cranes had multiple injuries (Table 1). Why do these birds collide with power lines? Part of the explanation may lie in the frontal area of blind vision which projects in the direction of travel when a flying crane pitches its head forward to look down (Fig. 1c), perhaps searching for other cranes on the ground or suitable feeding areas. We discuss and recommend several effective solutions that should increase power line visibility and reduce crane collisions and deaths.