Forming method of protection wall of manual hole digging pile

The invention relates to the technical field of civil engineering and construction, and discloses a forming method of a protection wall of a manual hole digging pile. The forming method comprises thefollowing steps that A, earthwork is dug to the designed depth, and a first protection wall formwork is erected; B, an extending part of the lower end of a first protection wall reinforcement cage isbent into a first bent part, the first protection wall reinforcement cage is lowered, and the first bent part is buried into burying earthwork; C, concrete is poured into the first protection wall formwork, and the first protection wall formwork is removed after the concrete is solidified and formed; D, earthwork is dug to the designed depth, and a second protection wall formwork is erected; E, asecond protection wall reinforcement cage is lowered, the first bent part of the first protection wall reinforcement cage is straightened to be connected with the upper end of the second protection wall reinforcement cage in a