Soil body stress testing device, soil body stress testing method and measuring system

The invention belongs to the technical field of line operation and maintenance, and discloses a soil body stress testing device, a soil body stress testing method and a measuring system. The soil bodystress testing device comprises a measuring box, wherein the measuring box is internally provided with: a pressure-bearing disc, a spring, a first vertical rod and a measuring ring, wherein one end of the first vertical rod is connected to the inner wall of the measuring box, and the other end of the first vertical rod is connected to the measuring ring, one end of the second vertical rod is connected to the inner wall of the measuring box, and the other end of the second vertical rod is connected to the sliding ring, the two ends of the measuring rod are connected to the pressure-bearing disc and the spring respectively, the measuring rod penetrates through the measuring ring and the sliding ring and can slide in the X direction relative to the measuring ring and the sliding ring; a fixing ring which is arranged