Device and method suitable for detecting pile shoe position of cylindrical pile leg lifting system

The invention provides a device and a method suitable for detecting the pile shoe position of a cylindrical pile leg lifting system. A sleeve of an adjusting mechanism is connected with a base of a jacking mechanism, a limiting mechanism is located in the sleeve and connected with the base, a sealing device covers the sleeve, a signal detection 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 and extends out of the base, the lifting system lifts a pile leg to drive a 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 the start, stop and lifting speed of the lifting system are controlled. The device and the method solve the problem that when an original pile leg is lifted, the well entering position is visually judged by an operator, and conseque