The utility model relates to an original state frozen soil sampling device of open-air probing sample. Shortcomings such as at present frozen soil sampling method commonly used exists that sample difficulty, artifical intensity of labour are big, sample inefficiency, the disturbance of original state soil are big. The utility model discloses an outer tube and the inner tube of tube-shape in, intraductal top-down be provided with the multisection cutting ring, be provided with annular dottle pin between the cutting ring, the outer tube top is connected with the drill bit, and the drill bit top is provided with the motor, the outer tube bottom is provided with the edge of a knife that fetches earth, the outer tube is become by two nests of tubes that narrow of axial symmetry, the dottle pin comprises two semicircle rings of symmetry. The utility model discloses simple structure, the flexible operation, portable, it is less to the disturbance of original state soil, keep soil sample original state nature, the follow-up use of being convenient for. Use straight alternating current motor, field in the indoor use of being convenient for.