Abstract: A lateral stabilizing device for a working ladder, wherein the working ladder has supporting legs, each supporting leg is configured with a frame holding groove, the bottom side of the supporting leg is fixed with a lateral stabilizing device, the lateral stabilizing device has a rotary connecting seat, the rotary connecting seat is configured with a rotary connecting slot matching the frame holding groove, the rotary connecting slot is plugged with a rotary shaft, the rotary shaft is sheathed with a first main spring and a swing frame, the swing frame is fixed with a ratchet wheel, the periphery of the ratchet wheel is distributed with teeth; the first main spring is fixed with a rotary connecting seat and a ratchet wheel; the top of the ratchet wheel is abutted with a swing component, the swing component is configured with a pawl meshing with the teeth.

Abstract: A stepladder includes two frames pivotally connected with each other, two pairs of support levers pivotally connected with the two frames, and two pairs of links pivotally connected with the two frames and pivotally connected with the support levers. Each of the two frames is provided with a side bar which has a first end formed with a connecting portion and a second end formed with a working portion. The working portion of the side bar is provided with a hook. Thus, each of the support levers is expanded and placed on the ground, and each of the links is connected between each of the support levers and each of the two frames in an inclined manner, so that the two frames are supported so as to prevent the stepladder from tipping or falling down.