The utility model discloses a power maintenance engineering ladder, terraced staircase and the fixing base of including of engineering, the last slide of staircase is fixed in the slide of the vertical setting in slide both sides under, be equipped with locking mechanism down between staircase and the last slide, the top layer step of going up the slide is the arc structure, the one end of top layer step is equipped with the lockhole, the other end of top layer step is fixed with the safety rope, the tip of going up the safety rope is equipped with the upper lock catch who is used for fixing in the lockhole, the fixing base includes the fixing base body of wedge structure, the lower surface of fixing base body is equipped with the slipmat, fixing base body upper surface is equipped with the fixed slot that is used for placing the staircase supporting legs. The utility model has the advantages of when a staff ascends a height the operation, do not need other staff holding up the ladder,can guarantee still that the staircase is fixed reliable and stable to staircase convenient to use can adapt to the operation demand of ascending a height of not unidimensional electric wire post.