Pile pulling device

A pile pulling device belongs to the technical field of pile pulling equipment and comprises a top seat, n-shaped vertical plates are arranged on two sides of the bottom surface of the top seat, a base is arranged at the bottom of each vertical plate, two rollers with a brake function are arranged at the bottom of each base, and a through hole penetrating through the top seat vertically is formed in the top seat. A hydraulic cylinder A for vertically driving the hydraulic shaft A is arranged on the top face of the base and located in the middle of the vertical plates, a bearing plate is arranged at the top end of the hydraulic shaft A, a machine box is arranged on the bearing plate, two hydraulic cylinders C which are vertically arranged and drive hydraulic shafts C to horizontally move are arranged on the machine box, and two clamping plates which are partially annular are arranged below the top base and located between the two vertical plates. The clamping plate is connected with the tail end of the hydraul