The utility model discloses a special ladder for a cable well, which comprises a longitudinal ladder fixed on a well wall, wherein the longitudinal ladder comprises two longitudinal ladder side beams and multiple ladder cross beams connected between the two longitudinal ladder side beams. The special ladder is characterized in that the bottom ends of the two longitudinal ladder side beams are connected with an oblique ladder side beam respectively, and each longitudinal ladder is intersected with the connected oblique ladder side beam to form an obtuse angle; the bottom ends of the two oblique ladder side beams are in contact with the well bottom ground; multiple ladder cross beams are arranged between the two oblique ladder side beams; the ladder cross beams between the two oblique ladder side beams form an oblique ladder; the ladder also comprises an additional ladder, wherein the additional ladder consists of two side beams and a cross beam fixedly connected between the two side beams, the top ends of the two side beams are arranged in a hook shape bent backward, and a section of insertion rod of which the outer diameter is less than the inner diameter of the longitudinal ladder side beam is arranged at the bottom ends of the two side beams. When in use, the special ladder for a cable well has good stability and high safety and is simple and convenient to operate.