The invention provides a high-speed train waiting hall roof ventilation louver cleaning device. According to the high-speed train waiting hall roof ventilation louver cleaning device, the length is adjusted through mutual screwed connection of multiple sections of straight rods, the angle can be adjusted, and through the cooperation of a cleaning head, a louver is subjected to cleaning and dust collection. The high-speed train waiting hall roof ventilation louver cleaning device is characterized in that the cleaning head is arranged on the top of a rod body which is composed of a linear section and a bending section, wherein the linear section is composed of an upper telescoping sleeve, an anti-slip sleeve, a connecting screw, a ball, an elastic base, a lower telescoping sleeve, anti-sliprubber pieces, a connecting nut, a locking ring, an annular groove, a locking handle, a locking pressure piece, a locking block, a clamping arm and a linear rod, the upper telescoping sleeve and the lower telescoping sleeve sleeve the two ends of the linear rod respectively, one anti-slip rubber piece is arranged on the end face of the top of the upper telescoping sleeve, the connecting screw is arranged in the middle of the top of the upper telescoping sleeve, the anti-slip sleeve sleeves the upper telescoping sleeve, the other one anti-slip rubber piece is arranged on the end face of the bottom of the lower telescoping sleeve, and the connecting nut is arranged in the middle of the bottom of the lower telescoping sleeve.