Double-layer boarding ladder

The utility model relates to a double-layer boarding ladder. The double-layer boarding ladder comprises a supporting platform (1), an upper stairway (2) and a lower stairway (3), wherein the upper stairway (2) is arranged in front of the lower stairway (3), both the upper stairway (2) and the lower stairway (3) incline downwards, and a sliding way (4) is transversely arranged on the supporting platform (1). The double-layer boarding ladder is characterized in that oscillating bar type travel switches (6) are arranged outside the front end and the rear end of the sliding way (4) respectively, pressing plates (7) are arranged on the left side and the right side of the sliding platform (5) respectively, each pressing plate (7) comprises an arc section, a linear and an arc section, the arc section, the liner section and the arc section of each pressing plate are arranged in sequence from the front portion to the rear potion of the pressing plate, the convex surface of each arc section inclines downwards, the height of each arc section is larger than the height of an oscillating bar (6.1) when the corresponding oscillating bar type travel switch (6) is in the natural state, and the height of each linear section is smaller than the height of the oscillating bar (6.1) when the corresponding oscillating bar type travel switch (6) is in the natural state. The double-layer boarding ladder has the advantages that the situation that accidents are caused due to the fact that the upper stairway slides out of the supporting platform is avoided, and safety is guaranteed.