Lateral expansion type crustal stress in-situ tester

The utility model relates to the technical field of testers, and discloses a side expansion type crustal stress in-situ tester, which comprises a tester main body, a switch, a movable handle, a data mounting block and a data line, a connecting module is fixedly mounted on the side surface of the data line, and mounting grooves are formed in the side surface of the tester main body corresponding to the two sides of the data mounting block. And two sets of open grooves are symmetrically formed in the side face of the connecting module, and clamping rods are movably mounted in the open grooves and arranged in the mounting grooves. According to the utility model, when the data line is installed, the clamping rod slides in the installation groove and extrudes the side surface position of the clamping block, the clamping rod extrudes the connecting cylinder to deform under the constraint of the constraint rod, and when the hook-shaped position of the clamping rod passes through the position of the clamping block, t