The utility model discloses settlement observation device relates to a settlement observation device who is arranged in building engineering. Its purpose for provide one kind more firm, make and to subside the settlement observation device that observation accuracy is higher. The utility model discloses settlement observation device is including implanting the body and surveing the body, implant the body including the implantation section that is arranged in implanting the wall body and with the screw thread section of implanting section integrated into one piece, it is expansion bolt structure to implant the section, the screw thread section is cylindrical member, the external screw thread has been seted up on the outer peripheral face of screw thread section, still be provided with in the screw thread section along the air discharge duct of its axis direction, the air discharge duct runs through the screw thread section, survey the body be cylindrical member, observe the body including well dead band and with well dead band integrated into one piece's observation section, the internal thread has been offered in the cavity of well dead band, the length of well dead band keeps unanimous with the length of screw section, survey the section be spherical structure. This device is less to the destruction of fitment faces such as stone material, and observation accuracy is high, and the appearance and modeling is pleasing to the eye, and convenient operation, accords with very much the theory of green construction.