Fixed-point foundation pit digging device

The utility model discloses a fixed-point foundation pit digging device, and particularly relates to the technical field of forest tree planting tools, which comprises a main plate, and an edge fixed-point mechanism is arranged at the bottom of the main plate; the edge point fixing mechanism comprises two main rods, the outer sides of the main rods are movably connected with the main plate in a sleeving mode, universal wheels are welded to the bottoms of the main rods, two first supporting rods are welded to one sides of the main rods, first directional wheels are fixedly arranged on one sides of the first supporting rods, and first fixing rods are fixedly arranged at the bottoms of the first directional wheels. Compared with the prior art, by arranging the edge point fixing mechanism, four first directional wheels are tightly attached to one side of a roadbed by holding a handle pushing device, the handle pushing device is held to move close to the edge of the roadbed, and friction force between the wheels a