The utility model relates to a folding type soil sampling tube, in particular to a folding type soil sampling tube which is convenient to disassemble and saves manpower. The sampling tube comprises a sampling tube body, a folding tube and a sampling head, wherein each of the sampling tube body and the folding tube is provided with a groove extending in the length direction; the folding tube is movably fixed on the sampling tube to enable the two grooves to be arranged in an opposite manner to form a cavity; a PVC tube is movably arranged in the cavity; the sampling head is fixedly arranged at the lower end part of the sampling tube body and communicated with the PVC tube. The folding type soil sampling tube has the advantages that the design is ingenious, the structure is simple, an inward raised structure formed by the inverted cone sampling head and the sampling tube body is utilized to effectively reduce the contact area of the sampling tube body and a sampling earth pillar and reduce the frictional resistance of the sampling tube body and the sampling earth pillar, and the collection of the earth pillar is facilitated; the device is convenient to disassemble, the sampling efficiency is high, and the labor of operating personnel can be effectively saved.