Drilling rig for geotechnical engineering investigation

The utility model provides a drilling rig for geotechnical engineering investigation. The drilling rig for geotechnical engineering investigation comprises a bottom plate, the tops of the four supporting assemblies are fixedly connected to the bottom of the bottom plate; the tops of the four moving assemblies are fixedly connected to the front side and the rear side of the bottom of the bottom plate correspondingly; and the top of the protection assembly is fixedly connected to the middle of the bottom of the bottom plate. According to the drilling rig for geotechnical engineering investigation, vibration generated in the drilling process of the drilling rig can be reduced through matched use of the components in the supporting component, and damage to some parts in the drilling rig due to long-time drilling work is avoided; and through cooperative use of the components in the protection component, sweeps generated during drilling can be blocked to a certain degree, and a safe working environment is provided