The invention provides a suspended inspection robot on a superhigh-voltage power transmission line. By the use of the suspended inspection robot, the problem that most current inspection robots have obstacle-crossing difficulties or part of obstacle-crossing robots are hard to control and are large in size is solved. The suspended inspection robot contains a control cabinet, inside which a control system is arranged. Detection equipment is arranged on the control cabinet. The top of the control cabinet is also provided with four actuating arms, wherein two of the four actuating arms are positioned in the middle of the control cabinet and the two actuating arms face each other and are laid back and forth in a staggered pattern. The other two actuating arms are positioned at two ends of the control cabinet, and the two actuating arms face each other and are laid back and forth. Each actuating arm contains a driving wheel set positioned on the top; a vertical driving mechanism is connected below the driving wheel set; the bottom of the vertical driving mechanism is connected with a horizontal driving mechanism; and the control system is connected with the driving wheel set, the vertical driving mechanism and the horizontal driving mechanism in an electronic control pattern. The suspended inspection robot provided by the invention has characteristics of strong obstacle crossing ability, large climbing gradient, stable structure, high control precision, simple operation, good real-time performance and the like.