Ground hollowing detection device

The utility model discloses a ground hollowing detection device which comprises a tray, the upper surface of the tray is fixedly connected with a motor supporting frame, the upper surface of the motor supporting frame is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a first rotating shaft, and the output end of the first rotating shaft is fixedly connected with a second rotating shaft. According to the ground hollowing detection device, when a user needs to carry out hollowing detection on the ground, the user only needs to turn on the servo motor, the servo motor drives the first rotating shaft to enable the first gear to rotate, and after the first gear rotates, the first rotating shaft is driven to rotate to drive the first gear to rotate; the first gear and the second gear are in meshing transmission with the second gear and the third gear, the three gears rotate to drive the sliding block to reciprocate up and down in the sliding way, the sliding block