The application discloses a drilling device for
geotechnical engineering investigation, which comprises a bottom plate, a driver arranged above the bottom plate, a
machine body arranged on the upper surface of the bottom plate, a transmission connection between the output end of the driver and the input end of the
machine body through a belt, a connecting piece arranged on one side of the
machine body, and an adjusting device arranged on the surface of the bottom plate. The adjusting device comprises two hollow frames, and the two hollow frames are arranged on the two sides of the bottom plate respectively. The adjusting device is arranged to facilitate position adjustment of the equipment. The existing equipment is usually of a fixed structure after
assembly and drilling, and needs to be drilled and investigated at different positions during drilling. Due to the over-
heavy equipment, operation is inconvenient during small-range movement, the
workload of workers is increased, the efficiency of the equipment during investigation at different positions is low, and the overall
usability of the equipment is improved.