Sampling device for geotechnical engineering investigation

The utility model discloses a geotechnical engineering investigation sampling device which comprises an investigation vehicle, a fixing frame is fixedly installed on the top side of the investigation vehicle, and a first telescopic motor and a second telescopic motor are fixedly installed on the top side of the fixing frame. When soil with the depth needs to be sampled, the exploration vehicle is moved, a deep column is moved to the position above a drilled hole, then a second telescopic motor is started, a second mounting plate moves to drive the deep column to move downwards, after the deep column moves to the position deep into the drilled hole, a worker rotates a rotating handle, a threaded rotating rod can be driven to rotate, and after the threaded rotating rod rotates, the deep column is driven to move downwards. According to the soil sampling device, the sampling barrel can be driven to rotate along with continuous rotation, the sampling barrel can be driven to move downwards, soil at the depth is dri