The utility model discloses a high-altitude circuit maintenance operation platform; a front stop device, a rear stop device, a left stop device and a right stop device are simultaneously arranged in usage so as to ensure work people safety when standing inside the platform; in addition, a bottom platform, the front stop device, the rear stop device, the left stop device and the right stop device are all formed by splicing beams through bolts or rivets; the high-altitude circuit maintenance operation platform is simple in structure, convenient in dismounting and transformation, can be dismounted for transportation, so whole piece transportation is not needed; parts can be assembled in field; a bottom plate is placed for work people to stand and place tools, and supporting intensity is strong; the bottom platform is divided into three equant first spaces; each first space is uniformly provided with two first oblique reinforcing beams in a cross manner; the front stop device and the rear stop device are respectively split into two equant second spaces, and each second space is uniformly provided with two second oblique reinforcing beams in a cross manner, so bearing capability is sufficient.