High-pressure water jet assisted pile pulling equipment and construction method

The invention discloses high-pressure water jet assisted pile pulling equipment which comprises a control part and a construction part, wherein an annular water storage chamber of the construction part is connected with a high-pressure water pump through a water inlet pipe I, and a circular open groove is formed in the bottom of the annular water storage chamber; an output shaft of a driving motor I in a driving area of the construction part is fixedly connected with a driving gear, an annular groove is formed in the top of an annular sliding block, sawteeth are arranged on the outer side edge of the annular sliding block, the annular groove is embedded into the circular open groove, and the driving gear is connected with the sawteeth in an engaged mode. A cutting area of the construction part is fixedly connected with the bottom of the annular sliding block through a communicating pipe, a telescopic spray pipe of the cutting area is externally embedded in the annular cutting track in the radial direction, an