Pile shoe position detection device suitable for cylindrical pile leg lifting system

A pile shoe position detecting device suitable for a cylindrical pile leg lifting system is connected with a base of a jacking mechanism through a sleeve of an adjusting mechanism, a limiting mechanism is located in the sleeve and connected with the base, a sealing device covers the sleeve, and a signal detecting device is located in the sealing device and connected with a cover plate of the adjusting mechanism. An ejector rod of the adjusting mechanism penetrates through the limiting mechanism and the adjusting mechanism to extend out of the base, the lifting system lifts the pile leg to drive the pile shoe to abut against the ejector rod to push the ejector rod to ascend, the ejector rod is detected by the signal detection device when ascending, and starting, stopping and lifting speed of the lifting system are controlled. The problem that when an original pile leg is lifted, an operator directly judges the well entering position, and a ship body is collided and is damaged and deformed is solved. The device