The utility model relates to a pier erodees sensing device, the technical problem of solution is: the utility model provides a basic overburden receives degradation degree sensing device around surveying the pier, comprises a plurality of electrode collar, upper cover, a plurality of sleeve, pointed cone and signal cable, and the pier erodees sensing device body is tubbiness cylindricality structure, and from the bottom up's connected mode is: bottom is provided with a pointed cone, first sleeve links to each other with the pointed cone, first sleeve links to each other with a second sleeve again, the junction is provided with an electrode collar, a second sleeve links to each other with a third sleeve again, the junction is provided with an electrode collar, it is connected with a plurality of sleeve and electrode collar to analogize to ask as required with this, final sleeve links to each other with the upper cover, all electrode collar draw the signal line and compile and draw in a signal cable, a pier erodees sensing device who forms like this, use with the cooperation of general high -density resistivity method appearance, basic overburden receives the degradation degree around conveniently detecting out the pier.