Standard section main limb tube detection device for elevators

The utility model particularly discloses a standard section main limb tube detection device for elevators. The device comprises a detection table, two sides of the detection table are respectively provided with positioning seats used for positioning and mounting a standard section main limb tube. One side of the standard section main limb tube is provided with a grating ruler for measurement. The grating ruler is connected to a display device, and is connected to an electrically-controlled pneumatic system through a connecting plate. The device has the advantages that when the length of the standard section main limb tube is measured, a detector controls the electrically-controlled pneumatic system only through an electrical control button 9, and records data by a grating ruler display, man-made measuring errors are eliminated, and the detecting accuracy is improved; the device is simple in structure, convenient to operate and high in practicality.