The invention discloses a manual wire rod digging device for power cable construction. The manual wire rod digging device comprises a barrel-shaped outer barrel, wherein an end is connected to the outer barrel, a first barrel cavity is formed in the outer barrel, an inner barrel which rotates in the first barrel cavity is arranged in the first barrel cavity, a second barrel cavity is formed in the inner barrel, a triangular second groove is formed in the end, the second groove correspondingly communicates with the first barrel cavity and the second barrel cavity, a driving disk which is correspondingly connected with the outer barrel is arranged in the second groove, a driving mechanism which is used for driving the driving disk to rotate is arranged in the second barrel cavity, so that the driving disk can be driven to rotate by utilizing the driving mechanism in the process that a sliding shaft slides up and down, and the outer barrel can be driven to rotate, and spiral disks in a spiral shape are respectively arranged on the outer barrel and the end, so that spiral drilling on the ground can be realized by utilizing the spiral disks, and the damage to crops caused by a large type excavator is further avoided.