Open caisson protection wall digging device for power transmission line iron tower

The utility model relates to the technical field of concrete foundations, in particular to an open caisson protection wall digging device for an electric transmission line iron tower, which comprises a first protection wall cylinder, a second protection wall cylinder, a third protection wall cylinder and a reinforcement cage, and the first protection wall cylinder is of a cylindrical structure. The wall protecting cylinder is reasonable and compact in structure, can meet the basic requirements of different specifications by adjusting the number of the third wall protecting cylinders, is wide in application range, can be conveniently mounted on site by detachably mounting the wall protecting cylinders together, can also be prefabricated firstly, reduces the labor intensity and improves the field operation efficiency; the power transmission line iron tower foundation can facilitate later installation of a power transmission line iron tower, can solve the problems of great waste and low economic benefit caused b