Safe working ladder

The utility model discloses a safe working ladder which comprises a main beam A, a main beam B and pedals, the number of the main beams A and the number of the pedals are both two, the pedals are installed between the main beams A and the main beams B at intervals, connecting shafts are arranged at the four corners of each pedal and are parallel to each other, the main beams A and the main beams Bare hinged to the pedals through the connecting shafts respectively, and the main beams A and B are parallel. The two pedals, the main beam A and the main beam B form a parallelogram, the lower portion of the main beam A and the lower portion of the main beam B are provided with a foot pad A and a foot pad B respectively, the foot pad B is fixedly connected with the main beam B, a screw is arranged on the foot pad A, and the foot pad A is connected with the main beam A through the screw. The foot pad A is arranged on the lower portion of the main beam A, the position of the foot pad A can beadjusted through the threa