Abstract: In the normal operation of the wind turbine, the blades are turning. To study the influence of blade rotation on the lightning attracting ability of wind turbine, a discharge test platform for scaling wind turbine meeting the needs of test was designed. The 50% impulse voltages and flash probabilities of scaling wind turbine with different gap distance in static and rotary conditions were obtained by discharge test and selective discharge test for scaling wind turbine with 1-8 m gap distance. High-speed camera and SLR camera were used for observation, and the development length, start time, and development speed of the upward leader were calculated. The test results show that in the discharge test of single wind turbine with gap distance of 1-2 m, the breakdown voltage of the scaling wind turbine increases with the increase of the blade rotation speed. While in the discharge test with gap distance of 4-8 m shows that the breakdown voltage of the fan decreases with the increase of the blade rotation speed. The test results prove the double scaling wind turbine experiment have the same rules. The high-speed observation of the discharge process shows that the length of the upward leader development decreases with the increase of the wind turbine speed at a short gap distance, and the opposite result occurs at a longer gap distance. In the discharge test of single wind turbine with 8 m gap distance, the observation shows that blade rotation advances the start of upward leader, and the development speed of upward leader has no obvious influence with the blade rotation. The theoretical analysis was carried out to explain the phenomenon that the rotation of the wind turbine will reduce the space charge density near the area, leading to the increase of the field strength close to the tip area of the wind turbine and the decrease of the filed strength far away from the tip area of the wind turbine. The short and long gaps have a different degree of influence, resulting in the opposite phenomenon of the short and long gaps. The results can provide reference for lightning protection of wind turbine.