Adjustable automatic pile driver for construction site

The invention discloses an adjustable automatic pile driver for a building site, which is characterized in that a bracket is fixedly mounted at one end of the top of a base, and a pile driving adjusting mechanism is fixedly mounted on one side of the middle part of the bracket, so that the angle of pile driving is convenient to adjust, and foundation piles with different inclination angles can be hit; the traction rope can repeatedly pull the pile hammer to advance up and down, then a foundation pile located below the guide sleeve is hit, the foundation pile can be hit by the pile hammer to be inserted into the ground, an arc-shaped incomplete gear and a driving rack are meshed with each other, and a hydraulic telescopic rod drives the driving rack to advance. When the pile hammer descends, the arc-shaped incomplete gear and the fixed vertical rod can be pushed to rotate together, the guide sleeve and the pile hammer can rotate along with the fixed vertical rod, the inclination angles of the guide sleeve and