Concrete extracting device for building detection

The utility model relates to the technical field of sampling devices, and particularly discloses a concrete extracting device for building detection, which comprises a material taking vertical cylinder, two feeding inclined cylinders are arranged at the upper end of the material taking vertical cylinder, are fixedly connected to two sides of the material taking vertical cylinder and are communicated with the material taking vertical cylinder, and a discharging pipe is arranged at one end, far away from the material taking vertical cylinder, of each feeding inclined cylinder. A material collecting bottle is arranged at the end, away from the feeding inclined cylinder, of the discharging pipe, a threaded feeding piece A is arranged in the material taking vertical cylinder, and a spiral feeding piece B is arranged in the feeding inclined cylinder. Concrete grout is continuously pumped into the material taking vertical cylinder through the spiral feeding piece A, after the concrete grout located at the top of the